Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
hang vat » dang vat, bang vat, cang vat
cong tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat tu » phan tu, pham tu, phap tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - canh ((hang vat) or (hang va)) dung cong tac phat tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - canh ((hang vat) OR (hang va)) dung cong tac phat tu.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - canh ((hang vat) or (hang va)) dung cong tac phat tu*.