Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
su sach » so sach, vu sach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
sang ma » nang ma, sang tao, mang may
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua
cua te » cua tu

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) or (toc sach)) ky ((sang ma) or (tang ma)) hoi. hieu va cac xuc va hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (toc sach)) ky ((sang ma) OR (tang ma)) hoi. hieu va cac xuc va hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (toc sach)) ky ((sang ma) or (tang ma)) hoi. hieu va cac xuc va hanh va cua te*.