Perhaps you should try some spelling variations:
thanh loi » thanh hoa, thanh hai, thanh lap
ban thanh » ban hanh, ban hang
cach dua » cach cua, cach dung, cac du
cua tre » cua te, cuu tre, cua triet
dua ban » dia ban, cua ban, qua ban
ve cach » va cach, ve cac, ve canh
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
cua tu » cua tuc, cua su, cua cu
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 ky) OR (sach y)) nang x hoi. hieu ve cach dua ban thanh loi ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang x hoi. hieu ve cach dua ban thanh loi ((cua tre) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang x hoi. hieu ve cach dua ban thanh loi ((cua tre) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang x hoi. hieu ve cach dua ban thanh loi ((cua tre) or (cua tu))*.