Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hoi chieu » doi chieu, ho chieu, hai chieu
trang vat » trang vai, tang vat, trang mat
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
trang va » tran van, hang va
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi chieu sang - hanh ((trang vat) OR (trang va)) dung ((cong manh) or (cong danh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi chieu sang - hanh ((trang vat) OR (trang va)) dung ((cong manh) OR (cong danh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi chieu sang - hanh ((trang vat) OR (trang va)) dung ((cong manh) or (cong danh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoi chieu sang - hanh ((trang vat) OR (trang va)) dung ((cong manh) or (cong danh)) toan tap*.