Perhaps you should try some spelling variations:
canh trang » canh tranh, hanh trang, banh trang
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
trang va » tran van, hang va
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than tap » toan tap, han tap, phan 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 chieu) or (hoc thieu)) xanh - canh trang va lang ((cong dan) OR (cong san)) than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) xanh - canh trang va lang ((cong dan) OR (cong san)) than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (hoc thieu)) xanh - canh trang va lang ((cong dan) OR (cong san)) than tap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) xanh - canh trang va lang ((cong dan) OR (cong san)) than tap*.