Perhaps you should try some spelling variations:
thien van » thi van
hanh thai » nhanh thai, hinh thai, anh thai
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
van bac » van ban, van bao, van hac
xuc van » duc van, luc van, vuc van
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: so sach ky lang xa hoi. thien van bac xuc van ((hanh thai) or (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang xa hoi. thien van bac xuc van ((hanh thai) OR (hanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky lang xa hoi. thien van bac xuc van ((hanh thai) or (hanh tai)) cua tre*.