Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
phat xuc » chat xuc, phat xuat, phap xu
tu cach » tu cac
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
doi cua » dai cua
hoi cua » hoi chuc
xuc va » duc va, tuc va, luc va
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 (thuoc sach)) ky nang x hoi. hieu va phat xuc va hanh ((doi cua) OR (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ky nang x hoi. hieu va phat xuc va hanh ((doi cua) OR (hoi cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thuoc sach)) ky nang x hoi. hieu va phat xuc va hanh ((doi cua) OR (hoi cua)) tre*".