Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
hieu sang » chieu sang, hieu lang, hieu quang
hang cong » dang cong, hang nong, bang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
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: doc hieu sang - hanh ((trinh quan) or (tinh chat)) hang cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - hanh ((trinh quan) OR (tinh chat)) hang cong manh toan ban*.