Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
hieu lang » chieu sang, hieu quang, nhieu tang
tuong cua » truong cua, huong cua, thong cua
khoan cam » khoa cam, khoan va, phan cam
cua hang » cua dang, cua nhung, cua cong
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, phan cac
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 - thanh tuong cua hang ((huong dan) or (cong tan)) ((khan cap) OR (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tuong cua hang ((huong dan) OR (cong tan)) ((khan cap) OR (khoan cam)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh tuong cua hang ((huong dan) or (cong tan)) ((khan cap) OR (khoan cam))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tuong cua hang ((huong dan) or (cong tan)) ((khan cap) OR (khoan cam))*.