Perhaps you should try some spelling variations:
trinh viet » ninh viet, trinh vat
nhung cong » dung cong, thong cong, hang cong
cua tinh » cua sinh, va tinh, ha tinh
trinh vi » trinh va, trinh ve, trinh van
cong san » cong tac
toan cao » toan tap
toan ban » van ban
hoa cua » hoa chat, hoa xuat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoa cua tinh - hanh ((trinh vi) or (trinh viet)) nhung cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoa cua tinh - hanh ((trinh vi) OR (trinh viet)) nhung cong san ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoa cua tinh - hanh ((trinh vi) or (trinh viet)) nhung cong san ((toan cao) or (toan ban))*.