Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hanh tai, anh thai
hinh thai » sinh thai, tinh thai, dinh thi
nang cho » nang chon, ngang cho, nang cao
tu sach » thu sach, su sach, te sach
dua ban » dia ban, cua ban, qua ban
sach ky » sac ky, sach y, sach ty
cho hoc » co hoc, khoa hoc
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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 ky nang cho hoc. hieu ((ve cam) or (va cac)) dua ban ((hanh thai) OR (hinh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang cho hoc. hieu ((ve cam) OR (va cac)) dua ban ((hanh thai) OR (hinh thai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cho hoc. hieu ((ve cam) or (va cac)) dua ban ((hanh thai) OR (hinh thai)) cua tre*".