Perhaps you should try some spelling variations:
duoc lieu » du lieu
doi lieu » doi chieu, du lieu, tai lieu
tranh va » tranh van, trang va, trinh va
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap
va lang » va nang, hoa lang

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 (duoc lieu)) tinh - canh tranh va lang ((cong dan) OR (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi lieu) OR (duoc lieu)) tinh - canh tranh va lang ((cong dan) OR (cong tan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi lieu) or (duoc lieu)) tinh - canh tranh va lang ((cong dan) OR (cong tan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi lieu) or (duoc lieu)) tinh - canh tranh va lang ((cong dan) OR (cong tan)) toan cau*.