Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
trung va » truong va, trang va, trung ha
nong san » cong san, dong san, trong san
nong dan » cong dan, nguong dan, huong dan
toan cao » toan ban, toan tap
va lang » va nang, hoa lang

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 - thanh trung va lang ((nong san) OR (nong dan)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh trung va lang ((nong san) OR (nong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh trung va lang ((nong san) OR (nong dan)) toan cao*.