Perhaps you should try some spelling variations:
truong thanh » truong trung, truong chung
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
nhung cong » dung cong, thong cong, hang cong
cong tan » cong tac, cong san, cong thanh
tan hang » tan khang, ban hang, van hang
hang cac » hang ca, hang cau, bang cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) OR (chieu sach)) - thanh ((truong thanh) or (truong thpt)) nhung cong tan hang cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - thanh ((truong thanh) OR (truong thpt)) nhung cong tan hang cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (chieu sach)) - thanh ((truong thanh) or (truong thpt)) nhung cong tan hang cac".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (chieu sach)) - thanh ((truong thanh) or (truong thpt)) nhung cong tan hang cac*.