Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thuc, trinh chat
trinh thiet » trinh viet, trinh thi
phung cong » nhung cong, phong cong, nhung chong
lieu tinh » trieu tinh, diep tinh, bien tinh
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban
ho lieu » so lieu, co lieu, ho kieu

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

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