Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
va hieu » van hieu, va dieu, cao hieu
hanh va » hang va, hanh vi
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
cao hoi » cau hoi, co hoi, cao hoc
ly nang » ky nang, ly hang, ly vang
va hien » van hien, va lien, va bien
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ly nang cao hoi. hieu ve nam thuc van hanh va ((va triet) or (((va hieu) OR (va hien))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang cao hoi. hieu ve nam thuc van hanh va ((va triet) OR (((va hieu) OR (va hien)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang cao hoi. hieu ve nam thuc van hanh va ((va triet) or (((va hieu) OR (va hien))))".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang cao hoi. hieu ve nam thuc van hanh va ((va triet) or (((va hieu) OR (va hien))))*.