Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
hoc cac » hoc cao
hau duc » huu duc, ha duc, pham duc
van hau » van ha, van hai, van dau
cua tre » cua te, cuu tre, cua triet
tu sach » su sach, te sach, tu cach
va cua » va chua, via cua, ca 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: ((hoc cac) or (((thu sach) or (tu sach)))) ky nang x hoi. hieu van hau duc va thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc cac) OR (((thu sach) OR (tu sach)))) ky nang x hoi. hieu van hau duc va thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((hoc cac) or (((thu sach) or (tu sach)))) ky nang x hoi. hieu van hau duc va thanh va cua tre*.