Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
hieu lang » chieu sang, nhieu tang, hieu van
quan ban » quang ban, qua ban, quan van
ban cong » bang cong, van cong, phan cong
ty tran » ly tran, tan tran, thi tran

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) OR (hieu quang)) - hanh trinh quan ban cong ((ty tran) or (ty trach)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - hanh trinh quan ban cong ((ty tran) OR (ty trach)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (hieu quang)) - hanh trinh quan ban cong ((ty tran) or (ty trach)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (hieu quang)) - hanh trinh quan ban cong ((ty tran) or (ty trach)) cau*.