Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, thanh san
su sach » so sach, vu sach
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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 xa hoi. hieu ((ve cam) OR (ve cac)) cuc ban ((thanh tai) or (doanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) cuc ban ((thanh tai) OR (doanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) cuc ban ((thanh tai) or (doanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) cuc ban ((thanh tai) or (doanh tai)) cua tre*.