Perhaps you should try some spelling variations:
thong truong » thuong truong, thong thuong, thong trong
trinh xuat » trinh luat, trinh xuan, trinh xay
trich xuat » trinh luat, trinh xuan
hieu lang » chieu sang, hieu quang, nhieu tang
van thanh » ban thanh, van tuan
van toan » van tuan, van tan, manh toan
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 xuat) OR (trich xuat)) thong truong ((van toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trinh xuat) OR (trich xuat)) thong truong ((van toan) OR (van thanh)) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((trinh xuat) OR (trich xuat)) thong truong ((van toan) or (van thanh)) cao*".