Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan thong » quang thong, quan trong, xuan thong
thong cong » trong cong, tong cong, thong thong
bien tinh » bi tinh, yen tinh, ban tinh
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chiet tach) or (((bien tinh) OR (diep tinh)))) - hanh trinh quan thong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (((bien tinh) OR (diep tinh)))) - hanh trinh quan thong cong san van ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chiet tach) or (((bien tinh) OR (diep tinh)))) - hanh trinh quan thong cong san van ban*".