Perhaps you should try some spelling variations:
phung dung » phuong dung, nhung dung, phuong duong
phung dang » phuong dung, phuong dong, phung quang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dang » hanh dong, anh dang, hanh dung
cong manh » cong danh, duong manh, cong thanh
cong dan » cong san, cong tan, huong dan
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 - hanh dang ((phung dung) OR (phung dang)) ((cong manh) or (cong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh dang ((phung dung) OR (phung dang)) ((cong manh) OR (cong dan)) toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh dang ((phung dung) OR (phung dang)) ((cong manh) or (cong dan)) toan cao*".