Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
cam nhung » cam hung, nam nhung, tham nhung
tung cam » dung cam, trung cap, tung pham
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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 tung cam nhung ((cong ban) or (cong san)) ((phan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tung cam nhung ((cong ban) OR (cong san)) ((phan cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh tung cam nhung ((cong ban) or (cong san)) ((phan cau) or (phan dau))*.