Perhaps you should try some spelling variations:
hanh dieu » han dieu, hinh dieu, hoang dieu
thuc van » thuc vat, thuc dan, thuc hanh
va triet » va thiet, va trien, ve 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 van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
dieu va » dieu van, lieu va, dien va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cac ((thuc van) or (thuc va)) hanh dieu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cac ((thuc van) OR (thuc va)) hanh dieu va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cac ((thuc van) or (thuc va)) hanh dieu va triet*".