Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
truong cao » truong dai
cong ngang » cong nhan, cong quang, cong lang
hoc chieu » hoc thieu, ho chieu, hoc hien
cong vang » cong lang, cong quang, cong san
thong tu » phong tuc, thong tin, thong ke
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 chieu sang - hanh ((thong tu) or (truong cao)) thong ((cong vang) OR (cong ngang)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh ((thong tu) OR (truong cao)) thong ((cong vang) OR (cong ngang)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - hanh ((thong tu) or (truong cao)) thong ((cong vang) OR (cong ngang)) than cau".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh ((thong tu) or (truong cao)) thong ((cong vang) OR (cong ngang)) than cau*.