Perhaps you should try some spelling variations:
ninh viet » sinh vien, anh viet
dai chao » dai thao, yali chao, lai chau
van ninh » van minh, van dinh, van binh
viet cua » viec cua, viet ca, viet qua
bo sach » co sach, hoc sach
cua tre » cua te, cuu tre, cua triet
xu van » tu van, vu van, su van
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: ((((tu cach) or (tu cac))) or (bo sach)) ky nang x hoi. hien dai chao xu van ninh viet cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu cach) OR (tu cac))) OR (bo sach)) ky nang x hoi. hien dai chao xu van ninh viet cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu cach) or (tu cac))) or (bo sach)) ky nang x hoi. hien dai chao xu van ninh viet cua tre*.