Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
anh trong » anh thuong, dinh trong, lang trong
van dung » van dong, xay dung, tin dung
tong tap » tuong tac, trong tan, cong tac
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap
va dung » va duong, vat dung, va ung

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 trong ((va dung) OR (van dung)) tong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu lang)) - anh trong ((va dung) OR (van dung)) tong tap toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (hieu lang)) - anh trong ((va dung) OR (van dung)) tong tap toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu lang)) - anh trong ((va dung) OR (van dung)) tong tap toan cau*.