Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
tuan trong » thuan trong, quan trong, toan trong
tran trong » gian trong, quan trong, tran hong
hoc thieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan khan » tan khang, tan nhan, toan khoan
khan ap » khan cap, han ap, khan dam

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 ((tuan trong) or (tran trong)) cong tan khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung ((tuan trong) OR (tran trong)) cong tan khan ap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung ((tuan trong) or (tran trong)) cong tan khan ap*.