Perhaps you should try some spelling variations:
hoc tieng » hoc hien
dong cong » duong cong, dung cong, dang cong
van thanh » ban thanh, van tuan
hoc tien » hoc hien, hoc vien, hoc tren
cong cua » cong cu, dong cua, huong cua
cua dong » chua dong, cua cong, cua dang
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc tien) or (hoc tieng)) thanh - thanh cong cua dong cong ((dan than) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc tien) OR (hoc tieng)) thanh - thanh cong cua dong cong ((dan than) OR (van thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc tien) or (hoc tieng)) thanh - thanh cong cua dong cong ((dan than) or (van thanh)) cao*.