Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cua thong » cua thuong, cua khong, cua tong
tan thanh » tran thanh, tang thanh, toan thanh
thanh cac » hanh cac, thanh bac, thanh ca
ho chieu » theo chieu, hoc thieu, doi chieu
cuu nang » chuc nang, cam nang, cuu van
cong tan » cong tac, cong san, cong thanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (ho chieu)) tach - thanh trung ((cua thong) or (cuu nang)) cong tan thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (ho chieu)) tach - thanh trung ((cua thong) OR (cuu nang)) cong tan thanh cac.
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (ho chieu)) tach - thanh trung ((cua thong) or (cuu nang)) cong tan thanh cac*.