Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tranh » hanh trinh, hanh trang, lanh tranh
dung chung » dung cong, dung ung, dung trung
doi chieu » doc hieu, doi chi, ho chieu
do van » dao van, vo van, so van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu tinh - ((hanh tranh) OR (canh tranh)) cua ((nhung phuong) or (dung chung)) do van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - ((hanh tranh) OR (canh tranh)) cua ((nhung phuong) OR (dung chung)) do van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - ((hanh tranh) OR (canh tranh)) cua ((nhung phuong) or (dung chung)) do van ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - ((hanh tranh) OR (canh tranh)) cua ((nhung phuong) or (dung chung)) do van ban*.