Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dinh cua » dinh cuu, sinh cua, dinh cu
chat xuc » chat huu, chao xu, chat cua
tu sach » su sach, te sach, tu cach
cua cua » cua chua, ca cua, qua cua
va dinh » van dinh, va kinh, va tinh
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet

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)) ty nang xa hoi. hieu ve ((chat xuc) or (cam xuc)) va dinh cua cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu ve ((chat xuc) OR (cam xuc)) va dinh cua cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang xa hoi. hieu ve ((chat xuc) or (cam xuc)) va dinh cua cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu ve ((chat xuc) or (cam xuc)) va dinh cua cua tre*.