Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
phat xuc » chat xuc, phat xuat, phap xu
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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 (tu cac))) or (thu sach)) ky nang x hoi. hieu va phat xuc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu cach) OR (tu cac))) OR (thu sach)) ky nang x hoi. hieu va phat xuc va hanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu cach) OR (tu cac))) or (thu sach)) ky nang x hoi. hieu va phat xuc va hanh di cua tre*".