Perhaps you should try some spelling variations:
thanh tung » thanh cong
hien sach » dien sach, kien sach, thien hach
tung tuan » trung tuan, hung tuan, quang tuan
tuan dung » tuan duong, tran dung, tan dung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
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 hien sach - thanh tung tuan dung ((cong tan) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - thanh tung tuan dung ((cong tan) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - thanh tung tuan dung ((cong tan) or (cong san)) toan cao*.