Is text in pdf file is protected?

Question

I have a pdf file written in Vietnamese language. I open it with Foxit Reader and able to read it in Vietnamese.

If I copy the text to Word I can't read the text in Vietnamese any more. Also, when I change mode to Text Viewer Mode in Foxit Reader, I can't read as well.

Is the publisher of pdf have encode their text? Or my computer Window 7 don't have fonts needed to read. If this is the case, how can I find the fonts being used?

Because I can't post images, I quote here extracted text I can't read

Nhûä ng xò-cùng-àan gêì n àêy trïn caá c phûúng tiïå n truyïì n thöng àaå i chuá ng vïì Enron, WorldCom, Tyco, ImClone, Arthur Anderson, Martha Stewart vaâ Global Crossing laâ nhûä ng caã nh baá o maå nh meä vïì cuöå c khuã ng hoaã ng kyä nùng laä nh àaå o hiïå n thúâ i trong nïì n kinh tïë Myä . Trïn thûå c tïë , söë lûúå ng caá c CEO bõ sa thaã i vò yïë u keá m àaä tùng àïë n 130% trong voâ ng saá u nùm qua. Roä raâ ng, haâ ng ngaâ n doanh nhên vaâ nhên viïn trong caá c cöng ty nhû vêå y àïì u coá thïí nhêå n àûúå c nhûä ng lúå i ñch tûâ caá c chiïë n lûúå c, yá tûúã ng laä nh àaå o vaâ àiïì u haâ nh àûúå c chia seã trong quyïí n saá ch naâ y.

Answer 1

"my computer Window 7 don't have fonts needed to read" - it could be. Check if you have appropriate fonts, found as Randolph West says, in the pdf properties. Another possibility is that your word can't show Vietnamese at all. Is it so? Third possibility: Mostly languages have several code tables. You can be looking at text in one code table, while it is written in another one. This possibility could be caused by font, too, but thus we return to the first case).

Make an experiment: Take the text, save it through PSpad (download it), as through notepad, as a file with htm extension and look at it through internet browser. There you can change the font/code table by hand.

If you can't see the text there anyway, the problem is in windows/pdf compatibility. Look out for recoding software.

If you can choose a coding to see it there, the problem is in Word. Simple font changing in Word change will help to see the text. Beware! You can see it, but you can have problems with printing or with giving it to somebody else (rather HE/SHE will have these problems). It depends on how rare the used coding table is. So, maybe, you need recoding even in this case, but you will already know from what to what the text should be translated.