Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, suat thong
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
phan cac » nhan cach, phan dau, phan lap

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 trung ((cua thong) or (cua tong)) ((huong dan) or (cong san)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung ((cua thong) OR (cua tong)) ((huong dan) OR (cong san)) phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung ((cua thong) or (cua tong)) ((huong dan) or (cong san)) phan cac*.