Perhaps you should try some spelling variations:
nhanh hoi » nhanh hai, nhanh hon, nhanh hoan
van nhanh » van thanh, van hanh, van khanh
loai nang » loai nam, luan nang, loai san
tu sach » thu sach, te sach, tu cach
hoi cua » hoi chuc
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
qua cac » cua cac
ly nang » ky nang, ly hang, ly vang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ((ly nang) or (loai nang)) xa hoi. hieu qua cac duc van nhanh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ((ly nang) OR (loai nang)) xa hoi. hieu qua cac duc van nhanh hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ((ly nang) or (loai nang)) xa hoi. hieu qua cac duc van nhanh hoi cua tre*.