Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang van » hoang van, hang va
danh sai » dung sai, danh bat, danh dau
su triet » su viet, su tien, ve triet
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
x hoi » xa hoi, o hoi, x ho
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang x hoi. hieu ve am thuc va ((dang van) or (danh sai)) ((su triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu ve am thuc va ((dang van) OR (danh sai)) ((su triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu ve am thuc va ((dang van) or (danh sai)) ((su triet) or (va triet))*.