Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
dinh cau » dinh chau, dinh cuu, dinh cu
cau treo » cau theo, cau tren, cau triet
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van lam » van nam
lam xuc » cam xuc, lam duoc
xuc van » duc van, luc van, vuc van
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa

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 ty nang ((((o hoi) or (co hoi))) or (x ho)). hieu van lam xuc van hanh dinh cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang ((((o hoi) OR (co hoi))) OR (x ho)). hieu van lam xuc van hanh dinh cau treo.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang ((((o hoi) or (co hoi))) or (x ho)). hieu van lam xuc van hanh dinh cau treo*.