Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
cong vinh » cong trinh, trong vinh, cong viec
vinh toan » tinh toan, hinh toan, minh toan
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((trinh quan) or (trinh han)) dung cong vinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trinh quan) OR (trinh han)) dung cong vinh toan ban.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trinh quan) or (trinh han)) dung cong vinh toan ban*.