Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thang viet » trang viet, hang viet, than viet
thong viet » thuong viet, tieng viet
dung hoang » dang hoang, dung hong, khung hoang
hoc thieu » toc thieu, hoc hien
hoang van » hang va
thanh tap » thanh lap, thanh tai, thanh tay
thuy » thu, thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - nhanh ((thang viet) OR (thong viet)) dung hoang van ((thanh tap) or (thanh thuy))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - nhanh ((thang viet) OR (thong viet)) dung hoang van ((thanh tap) OR (thanh thuy)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - nhanh ((thang viet) OR (thong viet)) dung hoang van ((thanh tap) or (thanh thuy))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - nhanh ((thang viet) OR (thong viet)) dung hoang van ((thanh tap) or (thanh thuy))*.