Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
chat cuc » chat cua, chat xuc, chi cuc
cau tren » cu tren, dau tren, ca tren
va chat » van chat, va phat, cao chat
cuc ban » cua ban, cac ban, cuu ban
ban anh » ban hanh, ban banh, ban danh
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa
d cau » da cau, di cau, _ cau

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) or (toc sach)) ky nang ((o hoi) or (co hoi)). lieu va chat cuc ban anh d cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang ((o hoi) OR (co hoi)). lieu va chat cuc ban anh d cau tren.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky nang ((o hoi) or (co hoi)). lieu va chat cuc ban anh d cau tren*.