Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
hanh trinh » canh tranh
luat dung » suat dung, luat chung, luat quang
dung cong » dung trong
cong san » cong tac
san toan » van toan, dan toan, manh 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: doi ((chieu tinh) OR (trieu tinh)) - ((hanh trinh) or (hanh chinh)) luat dung cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tinh) OR (trieu tinh)) - ((hanh trinh) OR (hanh chinh)) luat dung cong san toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu tinh) OR (trieu tinh)) - ((hanh trinh) or (hanh chinh)) luat dung cong san toan tap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tinh) OR (trieu tinh)) - ((hanh trinh) or (hanh chinh)) luat dung cong san toan tap*.