Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
canh trinh » canh tranh, canh tinh, anh trinh
nhung cong » dung cong, thong cong, hang cong
hieu sang » chieu sang, hieu lang, hieu quang
doc hieu » toc thieu, hoc thieu, hoc hien
ve nhung » va nhung, tu nhung
cong dan » cong san, cong tan, huong dan
phan cau » phan dau, phan cac, phan tu
hang dau » hang va, hang tai

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 sang - ((canh trinh) OR (hanh trinh)) ve nhung cong dan ((phan cau) or (hang dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - ((canh trinh) OR (hanh trinh)) ve nhung cong dan ((phan cau) OR (hang dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sang - ((canh trinh) OR (hanh trinh)) ve nhung cong dan ((phan cau) or (hang dau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - ((canh trinh) OR (hanh trinh)) ve nhung cong dan ((phan cau) or (hang dau))*.