Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan lap

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 tranh va nhung cong dan ((than cau) or (((phan cau) OR (phan tu))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh tranh va nhung cong dan ((than cau) OR (((phan cau) OR (phan tu))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh tranh va nhung cong dan ((than cau) or (((phan cau) OR (phan tu))))*".