Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
trinh han » trinh quan
han nhung » hanh nhung, hon nhung, ban nhung
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, cong tac
toan cau » toan cao, toan ban, toan tap

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 trinh han nhung ((((cong dan) or (cong dong))) or (huong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trinh han nhung ((((cong dan) OR (cong dong))) OR (huong dan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trinh han nhung ((((cong dan) or (cong dong))) or (huong dan)) toan cau*.