Perhaps you should try some spelling variations:
hang dau » hang tai
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh va » hanh vi
su tien » su kien, su hien, tu tieng
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: su sach ly ((hang dau) or (hang va)) hoi. hieu ve am thuc va hanh va su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((hang dau) OR (hang va)) hoi. hieu ve am thuc va hanh va su tien.
• Adding a wildcard symbol may retrieve word variants: su sach ly ((hang dau) or (hang va)) hoi. hieu ve am thuc va hanh va su tien*.