Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
dinh vai » dinh van, dinh vi, dinh va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
cac lo » cac lop, cac co, cac ho
cac bo » bac bo, cac co

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu hien ((cac lo) OR (cac bo)) va dinh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu hien ((cac lo) OR (cac bo)) va dinh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu hien ((cac lo) OR (cac bo)) va dinh vai cua tre*.