Perhaps you should try some spelling variations:
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu vu » hieu va, hieu ve, hieu su
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
vu cam » vu cham, vu cao, va cam
di cuu » di cau, di cua, dinh cuu

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