Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trung vap » trung cap, trung van, trung lap
trung va » truong va, trang va, trung ha
cong san » cong tac
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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 - thanh ((trung vap) or (trung va)) nhung cong san ((phan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trung vap) OR (trung va)) nhung cong san ((phan cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung vap) or (trung va)) nhung cong san ((phan cau) or (phan dau))*.