Perhaps you should try some spelling variations:
thuong chau » phuong cham, thuong chi, thuong han
thieu sang » chieu sang, thieu khang, thieu quang
thuong cao » truong cao, thong cao, thuong mai
hoc thieu » toc thieu, hoc hien
luong tap » luong tai, cuong tap, luong tham
cong tap » cuong tap, cong tac, cong tan
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 - thanh ((thuong cao) OR (thuong chau)) hang ((cong tap) or (luong tap)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((thuong cao) OR (thuong chau)) hang ((cong tap) OR (luong tap)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh ((thuong cao) OR (thuong chau)) hang ((cong tap) or (luong tap)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((thuong cao) OR (thuong chau)) hang ((cong tap) or (luong tap)) toan cao*.