Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
duc manh » suc manh, duc anh, duc minh
thai cua » than cua, tai cuc, tri cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
vuc van » duc van, luc van, thuc van
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai

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 ky nang o hai. hieu ve cham ((vuc van) or (((duc va) or (duc manh)))) nhanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hai. hieu ve cham ((vuc van) OR (((duc va) OR (duc manh)))) nhanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang o hai. hieu ve cham ((vuc van) or (((duc va) or (duc manh)))) nhanh thai cua tre*.