Perhaps you should try some spelling variations:
phuong doan » phuong loan, phuong hoang, huong dan
thanh trung » thanh tung
hieu xanh » chieu xanh, hieu manh, hieu nganh
trung cap » truong cao, trung tam
doc hieu » toc thieu, hoc thieu, hoc hien
cap bang » cao bang, can bang, lap bang
than ban » thanh ban, than man, nhuan ban
toan ban » van ban
toan va » doan va, tran van, 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 - thanh trung cap bang phuong doan ((((than ban) or (toan ban))) or (toan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh trung cap bang phuong doan ((((than ban) OR (toan ban))) OR (toan va)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh trung cap bang phuong doan ((((than ban) or (toan ban))) or (toan va))*.