Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh hung, hanh dung
thanh tung » thanh cong
hieu cach » hieu cac, chieu sach, hieu ca
doc hieu » toc thieu, hoc thieu, hoc hien
dong ban » dong bang, dong san, dong bac
ban khan » ban than, ban nhan, ban chan
khan cap » khan ap, than cap, khoan cam

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 cach - ((thanh dung) OR (thanh tung)) cua cong dong ban khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu cach - ((thanh dung) OR (thanh tung)) cua cong dong ban khan cap".
• Adding a wildcard symbol may retrieve word variants: doc hieu cach - ((thanh dung) OR (thanh tung)) cua cong dong ban khan cap*.