Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
va triet » va thiet, va trien, ve triet
thanh va » thanh van, hanh va, thanh ha
nam thuc » nam thuoc, am thuc, nam thu
dam thuc » am thuc, dan thuc, dai thuc
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
dang ha » dong ha, dung ha, lang ha
ha hoi » hoa hoi, ha noi, xa hoi
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) dang ha hoi. hieu ve ((dam thuc) or (nam thuc)) van thanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) dang ha hoi. hieu ve ((dam thuc) OR (nam thuc)) van thanh va va triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) dang ha hoi. hieu ve ((dam thuc) or (nam thuc)) van thanh va va triet*.