Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thu sach » thuat sach, thuoc sach, thu hoach
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, kho tang
tu sach » su sach, te sach, tu cach
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
tu sac » tu cac, tu san, tu bac

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

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