Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
va thong » va thuong, va phuong, va cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sach)) - thanh thang ((va thong) OR (he thong)) cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu sach)) - thanh thang ((va thong) OR (he thong)) cong tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sach)) - thanh thang ((va thong) OR (he thong)) cong tan toan cao*.