Perhaps you should try some spelling variations:
thanh tung » thanh cong
sinh sach » chinh sach, sang sach, sinh danh
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
sinh san » trinh san, sinh vat, sinh va
cong tac » cong ty
tac pham » thuc pham, san pham
pham ca » pham can, pham ma, pham va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sinh sach) or (sinh san)) - thanh tung ((cua khong) OR (hua khong)) cong tac pham ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sinh sach) OR (sinh san)) - thanh tung ((cua khong) OR (hua khong)) cong tac pham ca.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sinh sach) or (sinh san)) - thanh tung ((cua khong) OR (hua khong)) cong tac pham ca".
• Adding a wildcard symbol may retrieve word variants: hoc ((sinh sach) or (sinh san)) - thanh tung ((cua khong) OR (hua khong)) cong tac pham ca*.