Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thu lang » thu hang, thu bang, phu lang
van tuan » van quan, anh tuan
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
ve cac » va cac, vien cac
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) thu lang xa hoi. hieu ve cac luc ((van ban) or (van tuan)) dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) thu lang xa hoi. hieu ve cac luc ((van ban) OR (van tuan)) dai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) thu lang xa hoi. hieu ve cac luc ((van ban) or (van tuan)) dai cua te*".