Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thuong dan » huong dan, thuong han, thuong lan
thuong dam » thuong mai, huong dan, truong dai
hanh dung » thanh dung, anh dung, hanh dong
cua thong » cua thuong, cua khong, cua tong
dung cua » dung luan, dung cho
chan cao » chan cho, chat cao, chay cao

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) or (trieu tinh)) - hanh dung cua thong ((thuong dan) OR (thuong dam)) chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (trieu tinh)) - hanh dung cua thong ((thuong dan) OR (thuong dam)) chan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (trieu tinh)) - hanh dung cua thong ((thuong dan) OR (thuong dam)) chan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (trieu tinh)) - hanh dung cua thong ((thuong dan) OR (thuong dam)) chan cao*.