Perhaps you should try some spelling variations:
can thuc » dan thuc, van thuc, san thuc
cay thuc » cay thuoc, day thuc, cach thuc
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
sach 2 » sach y
2 nang » v nang
x hoi » xa hoi, o hoi, x ho

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 2 nang x hoi. lieu va ((can thuc) OR (cay thuc)) ((va hanh) or (van hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach 2 nang x hoi. lieu va ((can thuc) OR (cay thuc)) ((va hanh) OR (van hanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach 2 nang x hoi. lieu va ((can thuc) OR (cay thuc)) ((va hanh) or (van hanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach 2 nang x hoi. lieu va ((can thuc) OR (cay thuc)) ((va hanh) or (van hanh)) vai cua tre*.