Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
trung dap » trung cap, trung dai, trung dam
dung cong » dung trong
dap dung » ap dung, dan dung, dap ung
cong tan » cong tac, cong san, cong thanh
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau
khan cap » khan ap, than cap, khoan cam

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