Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
hoc bao » hoc cao, hoc bai, hoc bo
xuc ban » duc ban, cuc ban, quoc ban
sach ky » sac ky, sach y, sach ty
van cac » van hac, van cau, van bac
nang ho » nang hoc, nang co, tang ho
cua tre » cua te, cuu tre, cua triet
ho hai » hoc hai, pho hai, cho hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang ho hai. hieu van cac ((((xuc ban) or (hoc bao))) or (duc tan)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang ho hai. hieu van cac ((((xuc ban) OR (hoc bao))) OR (duc tan)) hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ho hai. hieu van cac ((((xuc ban) or (hoc bao))) or (duc tan)) hanh thai cua tre*.