Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tham soc » cham soc, tham nuoc, thai son
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
tay hoi » tay ho, tao hoi, tay thai
xay hoi » xa hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
soc va » hoc va, loc va, doc va
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang ((xay hoi) or (tay hoi)). hieu va tham soc va hanh vi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang ((xay hoi) OR (tay hoi)). hieu va tham soc va hanh vi ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ((xay hoi) or (tay hoi)). hieu va tham soc va hanh vi ((cua tre) or (cua viet))*.