Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hanh hang » thanh hang, hang hang, hanh han
bang cong » dang cong, bang song, dung cong
hang cong » dang cong, hang nong, thanh cong
ban thai » ban than, ban thi, ban tai
thai cao » tai cao, thoai cac, thuat 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 (hieu lang)) - hanh hang va ((bang cong) or (hang cong)) ban thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - hanh hang va ((bang cong) OR (hang cong)) ban thai cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - hanh hang va ((bang cong) or (hang cong)) ban thai cao*.