Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
cua thuoc » cay thuoc, cua nuoc, cua quoc
hieu van » hieu va, thien van, lieu va
thanh ve » hanh ve, thanh va, thanh vien
bach ty » sach ty, xach tay, bach thu
ty hang » ly hang, ty xang, thi hang
van cam » van nam, van lam, van cau
hang ca » hang va, nang cao, hang tai
duc ban » duc van, dua ban, duc man
ca hoi » cau hoi, cua hoi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ty hang ca hoi. hieu van cam ((duc ban) OR (duc tan)) thanh ve ((cua thuoc) or (nha thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ty hang ca hoi. hieu van cam ((duc ban) OR (duc tan)) thanh ve ((cua thuoc) OR (nha thuoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ty hang ca hoi. hieu van cam ((duc ban) OR (duc tan)) thanh ve ((cua thuoc) or (nha thuoc))".
• Adding a wildcard symbol may retrieve word variants: vu bach ty hang ca hoi. hieu van cam ((duc ban) OR (duc tan)) thanh ve ((cua thuoc) or (nha thuoc))*.