Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
tac than » tac thanh, tac nhan, bac thanh
tam than » ban than

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