Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
tong cong » trong cong, cong cong, dung cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
kinh va » kinh van, tinh va, sinh va
va tong » va thong, va tuong, va trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu tinh) or (may tinh)) - than kinh va tong cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (may tinh)) - than kinh va tong cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (may tinh)) - than kinh va tong cong tan toan cau*.