Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
qua cham » qua hai, qua cac, va cham
cham tuc » nham thuc, pham thuc, tham thuc
hanh doi » hanh noi, hang doi, hanh moi
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
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 ky nang ((5 hoi) OR (x ho)). hieu qua cham tuc va ((hanh doi) OR (thanh doi)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((5 hoi) or (x ho)). hieu qua cham tuc va ((hanh doi) OR (thanh doi)) cau tren~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((5 hoi) or (x ho)). hieu qua cham tuc va ((hanh doi) OR (thanh doi)) cau tren*.