Perhaps you should try some spelling variations:
sach kho » bach khoa, sach dao, sach nha
kho lang » kho tang, cho lang, tho lang
va gianh » va gian, van giang, va giai
te sach » toc sach
lang xa » lang ha, dang xay, lang van
lai cua » dai cua, hai cua, thai cua
ve cao » va cao, ve bao, ve co
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: te sach kho lang xa hoi. hieu ((ve cao) OR (ve cac)) duc va gianh ((lai cua) or (lai chau)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach kho lang xa hoi. hieu ((ve cao) OR (ve cac)) duc va gianh ((lai cua) OR (lai chau)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach kho lang xa hoi. hieu ((ve cao) OR (ve cac)) duc va gianh ((lai cua) or (lai chau)) te".
• Adding a wildcard symbol may retrieve word variants: te sach kho lang xa hoi. hieu ((ve cao) OR (ve cac)) duc va gianh ((lai cua) or (lai chau)) te*.