Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
van thanh » ban thanh, van tuan
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh ve, trinh vi
tan toan » tan tran, tap toan, van toan

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 - hanh ((trinh va) or (trinh vat)) dung cong ((tan toan) or (van thanh)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh ((trinh va) OR (trinh vat)) dung cong ((tan toan) OR (van thanh)) ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh ((trinh va) or (trinh vat)) dung cong ((tan toan) or (van thanh)) ban*.