Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
lieu tinh » trieu tinh, diep tinh, bien tinh
trang va » tran van, hang va
cong dan » huong dan, cong dong, cong tac
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
phan cau » phan dau, phan cac, phan tu
so lieu » so dieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so lieu tinh - hanh trang va nhung ((((cong dan) or (cong tan))) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so lieu tinh - hanh trang va nhung ((((cong dan) OR (cong tan))) OR (cong san)) phan cau.
• Adding a wildcard symbol may retrieve word variants: so lieu tinh - hanh trang va nhung ((((cong dan) or (cong tan))) or (cong san)) phan cau*.