Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
trong cao » truong cao, trong cac, trong cay
truong va » truong dai, truong cao, truong dao
tong cong » trong cong, cong cong, dung cong
trong ca » trong cac, trong nha
cong dan » cong san, cong tan, huong dan
dan khan » dan khanh, dan chan, dan than
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 ((((trong ca) or (trong cao))) or (truong va)) tong cong dan khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((((trong ca) OR (trong cao))) OR (truong va)) tong cong dan khan ap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((((trong ca) or (trong cao))) or (truong va)) tong cong dan khan ap*.