Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
tang van » dang van, hoang van, trong van
cua tre » cua te, cuu tre, cua triet
va xanh » va danh, va hanh, va banh
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
van hoc » van hoa
ky tang » ky nang, ky dang, kho tang
vu san » va san, vu ban
va anh » van anh, va danh, va hanh
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu bach) or (vu san)) ky tang van hoc. hieu vu cham luc ((va xanh) OR (va anh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (vu san)) ky tang van hoc. hieu vu cham luc ((va xanh) OR (va anh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu bach) or (vu san)) ky tang van hoc. hieu vu cham luc ((va xanh) OR (va anh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (vu san)) ky tang van hoc. hieu vu cham luc ((va xanh) OR (va anh)) di cua tre*.