Perhaps you should try some spelling variations:
nang dau » hang dau, xang dau, nang du
dia danh » dia ban, gia dinh
dau hoi » cau hoi, dai hoi, dan hoi
hieu he » hieu ve, hiem he, hieu le
xa danh » va danh, nam danh, van danh
sai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
su sai » su tai, su hai, su dai
sai ky » sac ky
he nam » ha nam, nghe nam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky nang dau hoi. hieu he nam thu ((xa danh) or (dia danh)) sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang dau hoi. hieu he nam thu ((xa danh) OR (dia danh)) sai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sai ky nang dau hoi. hieu he nam thu ((xa danh) or (dia danh)) sai cua tre*.