Perhaps you should try some spelling variations:
ban hanh » ban hang
dang xay » dang van, van xay
tu cach » tu cac
nam mua » nam cua, nam qua, nam luat
nam xua » nam cua, nam qua, nam luat
cua tre » cua te, cuu tre, cua triet
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
su sach » so sach, vu sach
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 (su sach)) ky dang xay hoi. lieu va ((nam xua) OR (nam mua)) ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky dang xay hoi. lieu va ((nam xua) OR (nam mua)) ban hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ky dang xay hoi. lieu va ((nam xua) OR (nam mua)) ban hanh vi cua tre*".