Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh
bien tinh » bi tinh, yen tinh, diep tinh
ganh nang » anh nang, nganh nong, van nang
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((lieu tinh) OR (bien tinh)) - ganh nang ((cua thong) OR (cua khong)) cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((lieu tinh) OR (bien tinh)) - ganh nang ((cua thong) or (cua khong)) cong tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((lieu tinh) OR (bien tinh)) - ganh nang ((cua thong) or (cua khong)) cong tan toan cao*.