Perhaps you should try some spelling variations:
hang doi » hang di, hang loi, huong doi
thuoc va » thuc va, thuoc ma, thuong va
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sac ky)) lang xa hoi. hieu ve nam ((thuc vat) or (thuoc va)) hang doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) lang xa hoi. hieu ve nam ((thuc vat) OR (thuoc va)) hang doi cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) lang xa hoi. hieu ve nam ((thuc vat) or (thuoc va)) hang doi cua tre*.