Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
banh thai » anh thai, ban thai, tranh thai
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, quoc ban
van dau » van dao, phan dau
dau xuc » dau xac, dau xua, dau nuoc
sach ky » sac ky, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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