Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hang doi » hang di, hang loi, huong doi
hanh di » hanh vi, hanh de, hang di
sach va » sach xa, sach ha, sach dao
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
xuc va » duc va, tuc va, luc va
va cam » va cham, va cac, va cao

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 va ((nang ma) or (nang x)) hoi. hieu va cam xuc va ((hanh di) or (hang doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach va ((nang ma) OR (nang x)) hoi. hieu va cam xuc va ((hanh di) OR (hang doi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach va ((nang ma) or (nang x)) hoi. hieu va cam xuc va ((hanh di) or (hang doi)) cua tre*.