Perhaps you should try some spelling variations:
thuc dayt » thuc vat, thuc dan, thuc xay
va triet » va thiet, va trien, ve triet
thuc day » thuc dan, thuc vat
qua cam » qua cham, qua cac, qua ca
nang xa » lang xa, nang ma, mang xa
danh vi » hanh vi, dinh vi, danh di
su sach » so sach, vu sach
vi va » vi van, vai va, vu va

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 y ((nang xa) OR (nang x)) hoi. hieu qua cam ((thuc dayt) or (thuc day)) danh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. hieu qua cam ((thuc dayt) OR (thuc day)) danh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) OR (nang x)) hoi. hieu qua cam ((thuc dayt) or (thuc day)) danh vi va triet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) OR (nang x)) hoi. hieu qua cam ((thuc dayt) or (thuc day)) danh vi va triet*.