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