Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chieu » theo tieu, ho chieu, theo chu
hanh tung » thanh tung, manh tung, hanh dung
anh tang » anh bang, anh dang, anh nang
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (doi chi)) xanh - ((hanh tung) or (anh tang)) va nhung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chi)) xanh - ((hanh tung) OR (anh tang)) va nhung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chi)) xanh - ((hanh tung) or (anh tang)) va nhung cong tan toan cau*.