Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
thong dan » thong van, tuong dan, thong den
chan cac » phan cac, nhan cach, thanh cac
chon cac » cho cac, thong cac, hoc cac

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 (trung tam)) thong thong dan ((chan cac) OR (chon cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((truong thanh) OR (trung tam)) thong thong dan ((chan cac) OR (chon cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh ((truong thanh) or (trung tam)) thong thong dan ((chan cac) OR (chon cac))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((truong thanh) or (trung tam)) thong thong dan ((chan cac) OR (chon cac))*.