Perhaps you should try some spelling variations:
khang cong » hang cong, thanh cong, dang cong
hien manh » hien hanh, tien manh, hieu manh
hanh tran » hanh trang, thanh tran, hanh tram
van khang » van khanh, van quang, van hanh
manh toan » thanh toan, anh tuan, tinh toan
van thanh » ban thanh, van tuan
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien manh - hanh tran van khang cong ((manh toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - hanh tran van khang cong ((manh toan) OR (van thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - hanh tran van khang cong ((manh toan) or (van thanh)) cao*.