Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
qua hai » qua hoat
hai xuc » hai cuc, hai xu, chat xuc
cua tre » cuu tre, cua triet, dua tren
su can » su van, su cao, tu can
can ky » van ky, dan ky, ban ky
ma hoi » mai hoi, ma hoa, me hoi
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su can ky nang ((ma hoi) OR (xa hoi)). hieu qua hai xuc va thanh dai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su can ky nang ((ma hoi) or (xa hoi)). hieu qua hai xuc va thanh dai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su can ky nang ((ma hoi) or (xa hoi)). hieu qua hai xuc va thanh dai ((cua tre) OR (cua te))*.