Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
ve cham » va cham, ve chat, vu cham
hanh va » hang va, hanh vi
hieu ve » hieu va, hieu van
sach ky » sach y, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
xuc va » tuc va, luc va, xac va
va cua » va chua, via cua, ca cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang mai khoi. hieu ve cham ((xuc va) OR (duc va)) hanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) nang mai khoi. hieu ve cham ((xuc va) or (duc va)) hanh va cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sac ky)) nang mai khoi. hieu ve cham ((xuc va) or (duc va)) hanh va cua tre*.