Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua cac, qua ca
thuc va » thuc vat, thuc dan, thuc day
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: so ((sach ky) OR (sach ty)) lang xa hoi. hieu qua cam ((thuc va) or (duc va)) hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sach ty)) lang xa hoi. hieu qua cam ((thuc va) OR (duc va)) hanh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sach ty)) lang xa hoi. hieu qua cam ((thuc va) or (duc va)) hanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sach ty)) lang xa hoi. hieu qua cam ((thuc va) or (duc va)) hanh vi va triet*.