Perhaps you should try some spelling variations:
trinh dai » trinh tai, trinh di, trinh da
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
chat xuc » chat huu, chao xu, chat cua
va trinh » van trinh, va tinh, lap trinh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
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: thu sach ky nang xa hoi. hieu van ((chat xuc) OR (cam xuc)) va trinh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu van ((chat xuc) OR (cam xuc)) va trinh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van ((chat xuc) OR (cam xuc)) va trinh dai cua tre*.