Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
doan van » doan va, hoang van, tran van
luan » quan, lan

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 nganh) or (chiet tach)) - hanh trinh cua dong cong ((doan van) OR (luan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (chiet tach)) - hanh trinh cua dong cong ((doan van) OR (luan van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu nganh) or (chiet tach)) - hanh trinh cua dong cong ((doan van) OR (luan van)) ban".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (chiet tach)) - hanh trinh cua dong cong ((doan van) OR (luan van)) ban*.