Perhaps you should try some spelling variations:
sach ly » sach y, sach lo, sach hay
tai cua » thai cua, tai cuc, tri cua
ba dinh » va dinh, xac dinh, nam dinh
xa dinh » xac dinh, va dinh, ha dinh
cac tuc » cac toc, cac tu, cac tac
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang va, hang ca
sach ty » sach y, sach tu, sach thu
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: co ((sach ly) OR (sach ty)) hang xa hoi. hieu ve cac tuc ((xa dinh) or (ba dinh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co ((sach ly) OR (sach ty)) hang xa hoi. hieu ve cac tuc ((xa dinh) OR (ba dinh)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co ((sach ly) OR (sach ty)) hang xa hoi. hieu ve cac tuc ((xa dinh) or (ba dinh)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: co ((sach ly) OR (sach ty)) hang xa hoi. hieu ve cac tuc ((xa dinh) or (ba dinh)) tai cua tre*.