Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
thanh tung » thanh cong
van thanh » ban thanh, van tuan
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap
anh van » anh va, thanh van, doanh van

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

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