Perhaps you should try some spelling variations:
chat luc » chat lua, nhan luc, chat huu
thu sach » thuat sach, thuoc sach, thu hoach
chat xuc » chat huu, cam xuc, chao xu
hanh le » thanh le, hanh ve, hanh de
va hanh » van hanh, va thanh, va danh
tu sach » su sach, te sach, tu cach
hieu vu » hieu va, hieu ve, hieu su
cua tre » cua te, cuu tre, cua triet
le cua » ly 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 sach) or (thu sach)) ky nang x hoi. hieu vu ((chat luc) OR (chat xuc)) va hanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x hoi. hieu vu ((chat luc) OR (chat xuc)) va hanh le cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang x hoi. hieu vu ((chat luc) OR (chat xuc)) va hanh le cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang x hoi. hieu vu ((chat luc) OR (chat xuc)) va hanh le cua tre*.