Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
tran van » luan van
tan van » tang van, luan van, dang 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 ((hieu manh) or (trieu tinh)) - hanh trinh cua thong cong ((tan van) OR (tran van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (trieu tinh)) - hanh trinh cua thong cong ((tan van) OR (tran van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (trieu tinh)) - hanh trinh cua thong cong ((tan van) OR (tran van)) ban".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (trieu tinh)) - hanh trinh cua thong cong ((tan van) OR (tran van)) ban*.