Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
tranh qua » tranh cua, thanh qua, trinh qua
manh cua » doanh cua, ban cua
cong san » cong tac
toan tap » toan ban

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 - canh ((tranh qua) or (manh cua)) dung ((cong thanh) or (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - canh ((tranh qua) OR (manh cua)) dung ((cong thanh) OR (cong san)) toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh ((tranh qua) or (manh cua)) dung ((cong thanh) or (cong san)) toan tap*.