Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham sat » cham mat, cham soc, khao sat
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
sat van » sat va, hat van, hoat van
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. lieu va cham sat van hanh vi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. lieu va cham sat van hanh vi ((cuu tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. lieu va cham sat van hanh vi ((cuu tre) or (cua triet))*.