Perhaps you should try some spelling variations:
ngoc anh » ngu anh
thuc dan » thuc hanh, hoc dan, thuc vat
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
thuc va » thuc vat, thuc day
vi va » vi van, vai va, vu va

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: ((tu sach) OR (ngoc anh)) ky nang xa hoi. hieu ve pham ((thuc va) OR (thuc dan)) hanh vi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (ngoc anh)) ky nang xa hoi. hieu ve pham ((thuc va) OR (thuc dan)) hanh vi va triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (ngoc anh)) ky nang xa hoi. hieu ve pham ((thuc va) OR (thuc dan)) hanh vi va triet*.