Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
trinh thuat » trinh luat, trinh thuc, trinh chat
hien tinh » khien tinh, thien tinh, bien tinh
hung cong » nhung cong, hung cuong, phung cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

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