Perhaps you should try some spelling variations:
quan phuong » quang phuong, luan phuong, xuan phuong
hoc thuyet » hoc chuyen
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thuyet) or (hoc hien)) tach - hanh trinh quan phuong ((cong ban) OR (cong san)) than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thuyet) OR (hoc hien)) tach - hanh trinh quan phuong ((cong ban) OR (cong san)) than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thuyet) or (hoc hien)) tach - hanh trinh quan phuong ((cong ban) OR (cong san)) than man".
• Adding a wildcard symbol may retrieve word variants: ((hoc thuyet) or (hoc hien)) tach - hanh trinh quan phuong ((cong ban) OR (cong san)) than man*.