Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
thanh hung » thanh huong, thanh tung, thanh trung
duong manh » duong van
hoc khien » hoc hien, hoc nghien, hoc thieu
cong danh » cuong danh, cong dan, cong thanh
hung cuu » hung chu, huong cua, nhung cau
cuu nong » cuu cong, cuu nang, cuu tong
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien bang - thanh hung cuu nong ((cong danh) or (duong manh)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien bang - thanh hung cuu nong ((cong danh) OR (duong manh)) ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc khien bang - thanh hung cuu nong ((cong danh) or (duong manh)) ((toan cao) or (toan ban))*.