Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
hanh trinh » canh tranh, hanh chinh
quan hang » quan hoang, quan lang, quan hanh
hang cong » dang cong, hang nong, bang cong
hien anh » hien hanh, thien anh, tien anh
dien anh » tieng anh, dien dan
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien anh) or (dien anh)) - hanh trinh quan hang cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (dien anh)) - hanh trinh quan hang cong dan than cap*.