Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tien manh » tien anh, tien thanh, tieng anh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
hoc tien » hoc tieng, hoc hien, hoc vien
cua dung » cua dang, cua dong, qua dung
dan van » dang van, doan van, dao 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 tien manh - hanh trinh cua dung cong ((dan van) or (hang va)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien manh - hanh trinh cua dung cong ((dan van) OR (hang va)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc tien manh - hanh trinh cua dung cong ((dan van) or (hang va)) ban*.