Perhaps you should try some spelling variations:
hdinh trong » hinh trong, chinh trong, sinh trong
thieu sang » chieu sang, thieu khang, thieu quang
dinh trong » sinh trong, chinh trong, dinh thuong
hoc thieu » toc thieu, hoc hien
nang cong » nang song, dang cong, bang cong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap
va nang » van nang, da nang, cam nang

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 - ((hdinh trong) or (dinh trong)) va nang cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hdinh trong) OR (dinh trong)) va nang cong tac than cau*.