Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
cua tre » cua te, cuu tre, cua triet
xang x » nang x
ve cam » ve cham, ve cac, va cam
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

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 ty xang x hoi. hieu ((ve cam) or (va cham)) thuc va danh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang x hoi. hieu ((ve cam) OR (va cham)) thuc va danh va cua tre*.