Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach ky » sac ky, sach y, sach ty
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
anh vi » hanh vi, anh ve, anh vu
anh va » hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang x ho. hieu ((ve cam) or (va cam)) duc van ((anh vi) or (anh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang x ho. hieu ((ve cam) OR (va cam)) duc van ((anh vi) OR (anh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang x ho. hieu ((ve cam) or (va cam)) duc van ((anh vi) or (anh va)) cua tre*.