Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
luan nhung » luan chung, luan hung, quan nhung
cong quang » luong quang, thong quang, duong quang
thien anh » thien danh, tien anh, thien thanh
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) OR (thien anh)) - anh dung luan nhung ((cong quang) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - anh dung luan nhung ((cong quang) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - anh dung luan nhung ((cong quang) or (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - anh dung luan nhung ((cong quang) or (cong tac)) toan cao*.