Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang cong » dang cong, hang nong, bang cong
van thanh » ban thanh, van tuan
hoc hieu » hoc thieu, hoc hien, doc hieu
tran van » luan van
van hang » van khang, van hoang, van thang

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 - thanh tran van hang cong ((tinh toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh tran van hang cong ((tinh toan) OR (van thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh tran van hang cong ((tinh toan) or (van thanh)) cao*.