Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
chua tre » chua tri, chua trieu, cho tre
thanh va » thanh van, hanh va, thanh ha
dong hoa » dong hoc, dong co
hieu thi » sieu thi, hieu chi, hiep thi
cuc ban » cua ban, cac ban, cuu ban
thi hai » thi mai, thi hanh
hai cuc » tai cuc, hai cua, thai cua
sach ty » sach tu, sach thu, xach tay
hoa hoi » khoa hoi, hoa hoc, hoa doi
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach ty) or (sach y)) dong hoa hoi. hieu thi hai cuc ban thanh va ((chua tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sach y)) dong hoa hoi. hieu thi hai cuc ban thanh va ((chua tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ty) or (sach y)) dong hoa hoi. hieu thi hai cuc ban thanh va ((chua tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) or (sach y)) dong hoa hoi. hieu thi hai cuc ban thanh va ((chua tre) OR (cua tre))*.