Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
manh khung » manh hung, manh tung, anh hung
doi chieu » doc hieu, doi chi, ho chieu
khung hoc » chung hoc, nhung hoc, thuong hoc
thong van » thong va, thong quan, truong van
trong van » trong cac
thanh cau » thanh chau, thanh mau, nhanh cau
hoc han » hoc phan, hoc hanh, hoc chan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - manh khung hoc han ((thong van) or (trong van)) thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - manh khung hoc han ((thong van) OR (trong van)) thanh cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - manh khung hoc han ((thong van) or (trong van)) thanh cau*.