Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
dang xay » dang van, van xay
tu cach » tu cac
xuc van » duc van, luc van, vuc van
hieu va » hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

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