Perhaps you should try some spelling variations:
lam thuc » lam thuoc, am thuc, nam thuc
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
va ve » va le, va vi, va vo
va de » va do, va le

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 y lang xa hoi. ((hieu ve) or (hieu va)) lam thuc van hanh ((va ve) or (va de)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y lang xa hoi. ((hieu ve) OR (hieu va)) lam thuc van hanh ((va ve) OR (va de)) triet.
• Adding a wildcard symbol may retrieve word variants: vu sach y lang xa hoi. ((hieu ve) or (hieu va)) lam thuc van hanh ((va ve) or (va de)) triet*.