Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
ban banh » ban hanh, ban anh, ban danh
quoc ban » quoc bao, quoc lan, quoc quan
cam quoc » cac quoc, cao quoc, nam quoc
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
tu nang » tru nang, tu nong, tu nano
hieu va » hieu qua
banh d » anh d, binh d
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: tu sach tu nang x hoi. ((hieu va) or (lieu va)) cam quoc ban banh d ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang x hoi. ((hieu va) OR (lieu va)) cam quoc ban banh d ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang x hoi. ((hieu va) or (lieu va)) cam quoc ban banh d ((cua tre) or (cua viet))*.