Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
chat xuc » chat huu, cam xuc, chao xu
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
vu chat » va chat, ve chat, du chat
hieu vu » hieu va, hieu ve, hieu su
dai hoi » dai hai, dai moi
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de cua
cua te » cua tu

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 y nang ((dai hoi) or (dai hoc)). hieu vu chat xuc ((van hanh) or (ban hanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ((dai hoi) OR (dai hoc)). hieu vu chat xuc ((van hanh) OR (ban hanh)) di cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ((dai hoi) or (dai hoc)). hieu vu chat xuc ((van hanh) or (ban hanh)) di cua te*.