Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 hieu manh - ((hanh trinh) or (thanh trung)) ((suat thong) or (cua tong)) cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh trinh) OR (thanh trung)) ((suat thong) OR (cua tong)) cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh trinh) or (thanh trung)) ((suat thong) or (cua tong)) cong tan toan cao*.