Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
cham luc » cham soc, nhan luc, cham cuu
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky

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