Perhaps you should try some spelling variations:
bien tinh » bi tinh, yen tinh, diep tinh
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh vi
trinh ve » trinh he, trinh vi, trinh viet
cong san » cong tac
toan cao » toan ban, toan tap
ho bien » pho bien, hoa bien, so bien
tan cao » tao cao, tay cao, tan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho bien tinh - canh ((trinh va) OR (trinh ve)) hang cong san ((tan cao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho bien tinh - canh ((trinh va) OR (trinh ve)) hang cong san ((tan cao) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho bien tinh - canh ((trinh va) OR (trinh ve)) hang cong san ((tan cao) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho bien tinh - canh ((trinh va) OR (trinh ve)) hang cong san ((tan cao) or (toan cao))*.