Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
luan trong » quan trong, luat trong, luan tuong
lieu tinh » trieu tinh, diep tinh, bien tinh
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
so lieu » so dieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so lieu tinh - ((hanh trinh) or (((anh tang) OR (anh dang)))) luan trong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so lieu tinh - ((hanh trinh) OR (((anh tang) OR (anh dang)))) luan trong cong tan toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so lieu tinh - ((hanh trinh) or (((anh tang) OR (anh dang)))) luan trong cong tan toan cao*".