Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thuat » ky thuat, ki thuat, va thuc
van hanh » van thanh, ban hanh, van anh
toc sach » hoc sach, doc sach, thuoc sach
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
dang xa » dang xay, lang xa, dang ha
xuc van » duc van, luc van, vuc van
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, dua tren

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 ky dang xa hoi. hieu ((va thuat) or (va cham)) xuc van hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky dang xa hoi. hieu ((va thuat) OR (va cham)) xuc van hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky dang xa hoi. hieu ((va thuat) or (va cham)) xuc van hanh vi ((cua tre) or (cua triet))*.