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