Perhaps you should try some spelling variations:
thanh huong » thanh hung, thanh cong, thanh tung
sinh sach » chinh sach, sinh san, sang sach
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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 - ((thanh huong) OR (anh huong)) cua ((tong cong) or (cong cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh sach - ((thanh huong) OR (anh huong)) cua ((tong cong) OR (cong cong)) dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh sach - ((thanh huong) OR (anh huong)) cua ((tong cong) or (cong cong)) dan than cao".
• Adding a wildcard symbol may retrieve word variants: hoc sinh sach - ((thanh huong) OR (anh huong)) cua ((tong cong) or (cong cong)) dan than cao*.