Perhaps you should try some spelling variations:
cao thuoc » cay thuoc, cua thuoc, nam thuoc
thuoc ma » hoc ma, duoc ma
va triet » va thiet, va trien, ve triet
so sach » so sanh, bo sach, co sach
qua cao » qua cac, qua ca, qua cai
ma hang » mat hang, mua hang, va hang
hang vi » hang va, hanh vi, hang di
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
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 ((y lang) or (_ lang)) xa hoi. hieu qua cao thuoc ma hang vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y lang) OR (_ lang)) xa hoi. hieu qua cao thuoc ma hang vi va triet*.