Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
manh trung » manh tung, thanh trung, manh hung
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty

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