Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
tung va » trung va, tuong va, dung va

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 sach) or (hieu manh))) or (chieu tinh)) - thanh tung va nhung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu sach) OR (hieu manh))) OR (chieu tinh)) - thanh tung va nhung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu sach) or (hieu manh))) or (chieu tinh)) - thanh tung va nhung cong tan toan cau*.