Perhaps you should try some spelling variations:
hang doi » hang di, hang loi, huong doi
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
xa hang » va hang, xa bang, xa hung
cac tac » cac toc, cac bac, cac dac
cac tuc » cac toc, cac tu, cac nuoc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, lang van
doi cua » dai cua, hoi cua

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 ((lang xa) OR (dang xay)) hoi. hieu ve ((cac tuc) or (cac tac)) xa hang doi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang xa) OR (dang xay)) hoi. hieu ve ((cac tuc) OR (cac tac)) xa hang doi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang xa) OR (dang xay)) hoi. hieu ve ((cac tuc) or (cac tac)) xa hang doi cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang xa) OR (dang xay)) hoi. hieu ve ((cac tuc) or (cac tac)) xa hang doi cua vat*.