Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
trang cua » tranh cua, tang cua, trung cua
cua thong » cua thuong, cua khong, cua tong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong thanh, cong ty, cong ha
cong tac » cong ty
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: doc hieu xanh - hanh trang cua thong ((((cong tan) OR (cong san))) or (cong tac)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trang cua thong ((((cong tan) OR (cong san))) OR (cong tac)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh trang cua thong ((((cong tan) OR (cong san))) or (cong tac)) toan tap".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trang cua thong ((((cong tan) OR (cong san))) or (cong tac)) toan tap*.