Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien hach » thien thanh, hien hanh
thanh song » thanh cong, thanh long, nhanh song
thong cong » trong cong, tong cong, thong thong
thanh son » thanh san, thanh cong, thanh toan
van thong » van thuong, van phong, va thong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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 sach) or (thien hach)) - ((thanh song) or (thanh son)) van thong cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (thien hach)) - ((thanh song) OR (thanh son)) van thong cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (thien hach)) - ((thanh song) or (thanh son)) van thong cong san toan cau*.