Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
danh vi » dinh vi, danh di, danh va
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
va cam » va cham, va cac, va cai
tuc va » thuc va, truc va, tuc xa
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly nang xa hoi. hieu ((va cam) or (va cao)) tuc va ((danh vi) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. hieu ((va cam) OR (va cao)) tuc va ((danh vi) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang xa hoi. hieu ((va cam) or (va cao)) tuc va ((danh vi) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang xa hoi. hieu ((va cam) or (va cao)) tuc va ((danh vi) OR (hanh vi)) cua tre*.