Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
dung cong » dung trong
hoc viet » hoc hien
cua dung » cua dang, cua dong, qua dung
doan van » doan va, hoang van, luan van
dao van » do 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: hoc viet trung - hanh tranh cua dung cong ((doan van) or (dao van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc viet trung - hanh tranh cua dung cong ((doan van) OR (dao van)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc viet trung - hanh tranh cua dung cong ((doan van) or (dao van)) ban*.