Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
kinh ca » kinh can, tinh ca, kinh co
va kinh » va tinh, qua kinh
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
me hoi » le hoi
tuc va » thuc va, truc va, tuc xa
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (te sach)) ky nang ((me hoi) or (ma hoa)). hieu va cac tuc va kinh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky nang ((me hoi) OR (ma hoa)). hieu va cac tuc va kinh ca cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ky nang ((me hoi) or (ma hoa)). hieu va cac tuc va kinh ca cua tre*.