Perhaps you should try some spelling variations:
gianh dai » gianh lai, gian dan, giang day
sach thu » sach thue, sach thieu, sach tham
thu lang » thu hang, thu bang, phu lang
va gianh » va gian, van giang, va giai
te sach » toc sach
van hoi » van hoa, van hoe, van loi
van hoc » van hoa
cua tre » cua te, cuu tre, cua triet
qua di » qua da, qua dieu
xuc va » duc va, tuc va, luc va

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 thu lang ((van hoi) OR (van hoc)). hieu qua di xuc va gianh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu lang ((van hoi) OR (van hoc)). hieu qua di xuc va gianh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach thu lang ((van hoi) OR (van hoc)). hieu qua di xuc va gianh dai cua tre*.