Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
cong manh » cong danh, duong manh, cong thanh
anh tang » anh bang, anh dang, anh nang
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) OR (hieu lang)) - anh tang va nhung cong manh ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu lang)) - anh tang va nhung cong manh ((toan tai) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (hieu lang)) - anh tang va nhung cong manh ((toan tai) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (hieu lang)) - anh tang va nhung cong manh ((toan tai) or (toan cao))*.