Perhaps you should try some spelling variations:
luan thong » luan phong, luan tuong, luat thong
hieu lang » chieu sang, hieu quang, nhieu tang
cach dung » sach dung, cach mang, tac dung
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - cach dung luan thong ((cong manh) or (cong danh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - cach dung luan thong ((cong manh) OR (cong danh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - cach dung luan thong ((cong manh) or (cong danh)) toan cau*.