Perhaps you should try some spelling variations:
cong quang » luong quang, thong quang, duong quang
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
luan hung » luan chung, lan hung, luan ung
anh dung » anh dong, anh huong, sach dung
cong tac » cong ty
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - anh dung luan hung ((cong quang) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - anh dung luan hung ((cong quang) OR (cong tac)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - anh dung luan hung ((cong quang) or (cong tac)) toan cao*.