Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham cuu » cap cuu, chat cua
tu cach » tu cac
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
van anh » van thanh, tuan anh, van minh
cuu tre » cua tre, cau tren, cau treo
anh ve » hanh ve, anh va, anh viet
ve cuu » ve cau, ve chu, ve cua
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (hoc sach)) ky nang ((o hoi) or (x ho)). hieu vu cham cuu van anh ve cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (hoc sach)) ky nang ((o hoi) OR (x ho)). hieu vu cham cuu van anh ve cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (hoc sach)) ky nang ((o hoi) or (x ho)). hieu vu cham cuu van anh ve cuu tre*.