Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt
truong chung » truong trung
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 ((truong thanh) OR (truong chung)) thong cong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh ((truong thanh) OR (truong chung)) thong cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((truong thanh) OR (truong chung)) thong cong dan than cau*.