Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh van » thanh san, thanh toan, thanh phan
thanh ban » thanh san, thanh bac, thanh bai
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
cam tuc » cam xuc, cam tu, dam thuc
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
hang x » nang x, hoang xa, chang xu
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: thuat sach ty hang x hoi. hieu ve ((cam tuc) or (nam thuc)) va ((thanh ban) OR (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty hang x hoi. hieu ve ((cam tuc) OR (nam thuc)) va ((thanh ban) OR (thanh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty hang x hoi. hieu ve ((cam tuc) or (nam thuc)) va ((thanh ban) OR (thanh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ty hang x hoi. hieu ve ((cam tuc) or (nam thuc)) va ((thanh ban) OR (thanh van)) cua tre*.