Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh trang » thanh trung, canh tranh, hanh trinh
hieu lang » chieu sang, nhieu tang, hieu van
trang cua » tranh cua, tang cua, trung cua
cua hang » cua dang, cua nhung, cua cong
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu lang) OR (hieu quang)) - hanh trang cua hang ((cong tap) or (cong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (hieu quang)) - hanh trang cua hang ((cong tap) OR (cong tan)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu lang) OR (hieu quang)) - hanh trang cua hang ((cong tap) or (cong tan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) OR (hieu quang)) - hanh trang cua hang ((cong tap) or (cong tan)) toan ban*.