Perhaps you should try some spelling variations:
tinh trang » minh trang, tinh quang, tinh toan
bang cong » dang cong, bang song, hang cong
doc hieu » toc thieu, hoc thieu
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan tap » toan ban
va bang » va nang, va lang, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) xanh - ((tinh trang) or (canh tranh)) va bang cong tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - ((tinh trang) OR (canh tranh)) va bang cong tan toan tap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) xanh - ((tinh trang) or (canh tranh)) va bang cong tan toan tap*.