Perhaps you should try some spelling variations:
hang truc » khung truc
hanh thai » nhanh thai, hinh thai, hanh tai
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
thai cua » than cua, tai cuc, tri cua
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
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: toc sach ky nang xa hoi. hieu van ((hang truc) or (cau truc)) van hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. hieu van ((hang truc) OR (cau truc)) van hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. hieu van ((hang truc) or (cau truc)) van hanh thai cua tre*.