Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
vien thanh » viet thanh, tien thanh, dien thanh
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
van thanh » ban thanh, van tuan
tranh va » tranh van, trang va, trinh va
va dang » van dang, va nang, va lang

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