Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
sach kho » bach khoa, sach dao, sach nha
kho tang » cao tang
ve triet » su triet
dinh ke » dinh ket, dinh ve, dinh le
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
tang xa » trang xa, tang ma, lang xa
xuc va » duc va, tuc va, luc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach kho tang xa hoi. lieu va cam ((xuc va) or (thuc va)) dinh ke ((ve triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach kho tang xa hoi. lieu va cam ((xuc va) OR (thuc va)) dinh ke ((ve triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach kho tang xa hoi. lieu va cam ((xuc va) or (thuc va)) dinh ke ((ve triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: te sach kho tang xa hoi. lieu va cam ((xuc va) or (thuc va)) dinh ke ((ve triet) OR (va trien))*.