Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhanh bang » nhanh lang, nhanh mang, nhanh quang
dung cong » dung trong
chu sang » chu bang, thu sang, chuc nang
bang vat » bang va, dang vat, cang vat
vat dung » van dung, va dung, viet dung
tac thai » rac thai, sac thai, tac thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu sang) or (chieu sang)) - nhanh bang vat dung cong ((tac thai) OR (toc thai)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sang) OR (chieu sang)) - nhanh bang vat dung cong ((tac thai) OR (toc thai)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sang) or (chieu sang)) - nhanh bang vat dung cong ((tac thai) OR (toc thai)) cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sang) or (chieu sang)) - nhanh bang vat dung cong ((tac thai) OR (toc thai)) cao*.