Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
danh vai » danh sai, danh va, doanh van
va cham » va chat, va tham
vai cau » va cau, van cau, vai cac
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
y xang » ty xang
ve cam » ve cham, ve cac, va cam
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 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 y xang ((x hoi) OR (o hoi)). hieu ((ve cam) or (va cham)) thuc va danh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y xang ((x hoi) OR (o hoi)). hieu ((ve cam) OR (va cham)) thuc va danh vai cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y xang ((x hoi) OR (o hoi)). hieu ((ve cam) or (va cham)) thuc va danh vai cau tren*".