Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
va triet » va trien, ve triet, cua triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc day
ve nam » he nam, va nam, le nam
thiet » thieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu ve nam ((thuc va) OR (thuc dan)) hanh vi ((va triet) OR (va thiet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu ve nam ((thuc va) OR (thuc dan)) hanh vi ((va triet) or (va thiet))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu ve nam ((thuc va) OR (thuc dan)) hanh vi ((va triet) or (va thiet))*.