Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
nhanh mang » nhanh lang, hanh mang, nhanh quang
hieu lang » hieu quang, nhieu tang, hieu van
vua dang » vu dang, va dang, vua sang
cua dang » cua cong, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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)) - nhanh mang ((vua dang) OR (cua dang)) cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu lang)) - nhanh mang ((vua dang) OR (cua dang)) cong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (hieu lang)) - nhanh mang ((vua dang) OR (cua dang)) cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu lang)) - nhanh mang ((vua dang) OR (cua dang)) cong tac toan ban*.