Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dau tren » dau tien, dat tren, dau tieng
nang ma » tang ma, nang cao, mang may
nang xa » nang x, lang xa, mang xa
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
sang ma » tang ma, sang tao, mang may
soc va » hoc va, loc va, doc va
va dau » va dao

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: thu sach y ((nang xa) OR (((nang ma) OR (sang ma)))) hoi. lieu va cham soc va hanh va dau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang xa) or (((nang ma) OR (sang ma)))) hoi. lieu va cham soc va hanh va dau tren~".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (((nang ma) OR (sang ma)))) hoi. lieu va cham soc va hanh va dau tren*.