Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, mang may
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
luu tre » luu tru, cuu tre, luy tre
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
vi luu » vi lua

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: tu sach ty ((nang x) OR (((nang ma) OR (nang cao)))) hoi. hieu va cam luc va hanh vi luu tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang x) or (((nang ma) or (nang cao)))) hoi. hieu va cam luc va hanh vi luu tre*.