Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
va cham » va chat, va tham
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, 5 hoi

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) OR (x ho)). hieu ((ve cam) or (va cham)) thuc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang ((x hoi) OR (x ho)). hieu ((ve cam) OR (va cham)) thuc va hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang ((x hoi) OR (x ho)). hieu ((ve cam) or (va cham)) thuc va hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang ((x hoi) OR (x ho)). hieu ((ve cam) or (va cham)) thuc va hanh vai cuu tre*.