Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
duong van » duong va, luong va, dang van
cong san » cong tac
song van » hoang van, trong van, dang van
tai cao » thai cao, tao cao, tai sao

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 - canh tranh cua nhung ((cong san) or (((song van) OR (duong van)))) tai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - canh tranh cua nhung ((cong san) OR (((song van) OR (duong van)))) tai cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - canh tranh cua nhung ((cong san) or (((song van) OR (duong van)))) tai cao*".