Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
bang cong » bang song, hang cong, dung cong
dang cong » dung cong
theo cuu » theo chu, khao cuu, thao cua
dan than » dan chan, ban than, van than
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: theo cuu tinh - hanh trinh luan ((bang cong) or (dang cong)) dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo cuu tinh - hanh trinh luan ((bang cong) OR (dang cong)) dan than man.
• Adding a wildcard symbol may retrieve word variants: theo cuu tinh - hanh trinh luan ((bang cong) or (dang cong)) dan than man*.