Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, mot chieu
trinh qua » trinh quan, trinh cua, trinh quang
qua chung » qua chuong, quat chung, cua chung
ho chieu » theo chieu, hoc thieu, mot chieu
cong van » cong vang, song van, cong tan
cong san » cong tac
luan ban » luan van, luan san, luan han

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) sach - hanh trinh qua chung ((cong van) or (cong san)) luan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - hanh trinh qua chung ((cong van) OR (cong san)) luan ban.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - hanh trinh qua chung ((cong van) or (cong san)) luan ban*.