Perhaps you should try some spelling variations:
nhung truong » nhung tuong, thuong truong, nang truong
truong thanh » truong trung, truong thpt, truong chung
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
thanh hoc » thanh hoa, than hoc, thanh ho
bang va » ban va, trang va, dang van
hoc dai » hoc dan

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

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