Perhaps you should try some spelling variations:
sach ky » sac ky, sach y, sach kem
va hanh » van hanh, va thanh, va danh
nay luc » nay lua, nang luc, nhan luc
lang ha » long ha
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
va nay » va ngay, va cay
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) or (sach ty)) ((nang xa) or (lang ha)) hoi. lieu va nay luc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) ((nang xa) OR (lang ha)) hoi. lieu va nay luc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach ty)) ((nang xa) or (lang ha)) hoi. lieu va nay luc va hanh vi cua tre*.