Perhaps you should try some spelling variations:
banh thai » anh thai, ban thai, nhanh thai
thai cuu » thai cua, tai cuc, thi cuc
quoc ban » quoc bao, quoc lan, quoc quan
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, te sach, tu cach
xuc ban » duc ban, cuc ban, xuat ban
van hau » van ha, van hai, van dau
su sach » so sach, vu sach
cuu tre » cua tre, cau tren, cau treo
nang o » nang co, nang ho, nang ro
o hoc » co hoc, mo hoc, so hoc

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 (su sach)) ky nang o hoc. hieu van hau ((xuc ban) OR (quoc ban)) banh thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang o hoc. hieu van hau ((xuc ban) OR (quoc ban)) banh thai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang o hoc. hieu van hau ((xuc ban) OR (quoc ban)) banh thai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang o hoc. hieu van hau ((xuc ban) OR (quoc ban)) banh thai cuu tre*.