Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thuc, trinh chat
trinh thiet » trinh viet, trinh thi
chieu tinh » trieu tinh, lieu tinh, chau tinh
hung cong » nhung cong, hung cuong, phung cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, 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: ho chieu tinh - hanh ((trinh thuat) or (trinh thiet)) hung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - hanh ((trinh thuat) OR (trinh thiet)) hung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - hanh ((trinh thuat) or (trinh thiet)) hung cong dan toan cao*.