Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
qua cham » qua hai, qua cac, va cham
hanh doi » thanh doi, hanh noi, hang doi
dau tren » dau tien, dat tren, dau tieng
su sach » so sach
vu sach » vu bach, vu khach
va hanh » van hanh, va thanh, va danh
doi dau » doan dau
tuc va » thuc va, truc va, tuc xa
5 hoi » o hoi

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: ((su sach) OR (vu sach)) ky nang ((5 hoi) OR (x ho)). hieu qua cham tuc va hanh doi dau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky nang ((5 hoi) or (x ho)). hieu qua cham tuc va hanh doi dau tren~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky nang ((5 hoi) or (x ho)). hieu qua cham tuc va hanh doi dau tren*.