Perhaps you should try some spelling variations:
su sach » so sach, vu sach
vai cua » hai cua, lai cua, bai cua
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mang xa » lang xa, mang may, dang xay
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((mang xa) or (nang x)) hoi. hieu ve cac xuc va hanh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((mang xa) OR (nang x)) hoi. hieu ve cac xuc va hanh ((vai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((mang xa) or (nang x)) hoi. hieu ve cac xuc va hanh ((vai cua) or (dai cua)) tre*.