Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
hanh tram » hanh tam, hanh trang, thanh tran
van nhung » van nhuong, va nhung, van hung
hanh lam » thanh lap, hanh kem, hanh va
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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 tram) or (hanh lam)) van nhung ((cong dan) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((hanh tram) OR (hanh lam)) van nhung ((cong dan) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((hanh tram) or (hanh lam)) van nhung ((cong dan) or (cong tac)) toan cau*.