Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
luat chung » luan chung, luat thuong, cua chung
luat cong » thuat cong, cua cong, luat canh
doi lieu » duoc lieu, doi chieu, tai lieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi lieu) or (du lieu)) tinh - hanh trinh ((luat cong) OR (luat chung)) cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi lieu) OR (du lieu)) tinh - hanh trinh ((luat cong) OR (luat chung)) cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi lieu) or (du lieu)) tinh - hanh trinh ((luat cong) OR (luat chung)) cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doi lieu) or (du lieu)) tinh - hanh trinh ((luat cong) OR (luat chung)) cong dan toan cao*.