Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh chat
trinh thuc » trinh tu, trinh thi
hieu lang » chieu sang, hieu quang, nhieu tang
hung cong » nhung cong, hung cuong, phung cong
cong tinh » cong trinh, cong vinh, long tinh
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 thuat) or (trinh thuc)) hung cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trinh thuat) OR (trinh thuc)) hung cong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trinh thuat) or (trinh thuc)) hung cong tinh toan ban*.