Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van thanh » van tuan
cham sac » cham soc, pham sach, cap sac
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
san cua » sang cua, ban cua, dan cua
hieu ve » hieu va, hieu van
hieu vu » hieu va, hieu su, dieu vu
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
dan ky » van ky
tu dan » tuc dan, tu ban, cu dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky dang xay hoi. ((hieu vu) OR (hieu ve)) cham sac ((van thanh) or (ban thanh)) san cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky dang xay hoi. ((hieu vu) OR (hieu ve)) cham sac ((van thanh) OR (ban thanh)) san cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky dang xay hoi. ((hieu vu) OR (hieu ve)) cham sac ((van thanh) or (ban thanh)) san cua tre".
• Adding a wildcard symbol may retrieve word variants: tu dan ky dang xay hoi. ((hieu vu) OR (hieu ve)) cham sac ((van thanh) or (ban thanh)) san cua tre*.