Perhaps you should try some spelling variations:
hang thai » hoang thai, hang tai, hang hai
thai cua » than cua, tai cuc, tri cua
ban hang » ngan hang
te sach » toc sach
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
cho hoc » khoa hoc
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((cho hoc) OR (co hoc)). hieu ((ve cam) or (ve cac)) dua ban hang thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((cho hoc) OR (co hoc)). hieu ((ve cam) OR (ve cac)) dua ban hang thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((cho hoc) OR (co hoc)). hieu ((ve cam) or (ve cac)) dua ban hang thai cua tre*".