Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
hanh manh » hanh mang, lanh manh, hoang manh
cua tong » cua dong, cua nong, cua song
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran cao » toan cao, tran chau, trang cho

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 - hanh manh ((cua tong) or (cua cong)) ((cong tan) or (cong san)) tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh manh ((cua tong) OR (cua cong)) ((cong tan) OR (cong san)) tran cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh manh ((cua tong) or (cua cong)) ((cong tan) or (cong san)) tran cao*.