Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cam cac » ca cac, nam cac, cam chan
cac ban » cac dan, cac van, can ban
ban anh » ban hanh, ban banh, ban danh
su viet » so viet
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
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 y nang ((x hoi) or (x ho)). hieu va cam cac ban anh d ((cua triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((x hoi) OR (x ho)). hieu va cam cac ban anh d ((cua triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((x hoi) or (x ho)). hieu va cam cac ban anh d ((cua triet) or (su viet))*.