Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
van nhuong » van chuong, van phuong, van huong
trong vinh » trong kinh, trong sinh, trong linh
hieu lang » chieu sang, hieu quang, nhieu tang
van nhung » va nhung, van hung, van phung
vinh toan » tinh toan, hinh toan, minh toan
toan tap » toan ban

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

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