Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
nhung dung » phuong dung, ung dung, thong dung
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
doi hieu » doi chieu, doc hieu, doi hien
tan tap » toan tap, han tap, man tap
tan tat » ban tat, toan tap, toan tai

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

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