Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
hieu manh » chieu xanh, hieu nganh, dieu hanh
quan hang » quan hoang, quan lang, quan hanh
hang cong » dang cong, hang nong, bang cong
van thanh » van tuan
ban thanh » ban hanh, ban hang
tien anh » tieng anh, tien manh, dien anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (tien anh)) - hanh trinh quan hang cong ((van thanh) OR (ban thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (tien anh)) - hanh trinh quan hang cong ((van thanh) OR (ban thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (tien anh)) - hanh trinh quan hang cong ((van thanh) OR (ban thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (tien anh)) - hanh trinh quan hang cong ((van thanh) OR (ban thanh)) cau*.