Perhaps you should try some spelling variations:
ve cham » va cham, ve chat, vu cham
hanh di » hanh vi, hanh de, hang di
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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 ky ((nang x) or (nang cao)) hoi. hieu ve cham ((xuc va) or (luc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang x) OR (nang cao)) hoi. hieu ve cham ((xuc va) OR (luc va)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang x) or (nang cao)) hoi. hieu ve cham ((xuc va) or (luc va)) hanh di cua tre*.