Perhaps you should try some spelling variations:
nguoi san » nguoi tay, nguoi dao, nguoi ma
cua triet » cua viet, su triet, va triet
chau phi » chi phi, chau tho
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
ve chau » ve cau, ve chat, le chau
phi van » phi san, thi van, phi va
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, dua tren
san ky » sang ky, van ky, dan ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: nguoi san ky nang x hoi. hieu ve chau phi van hanh de ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nguoi san ky nang x hoi. hieu ve chau phi van hanh de ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: nguoi san ky nang x hoi. hieu ve chau phi van hanh de ((cua tre) or (cua triet))*.