Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hieu van » hieu va, thien van, lieu va
thanh ve » hanh ve, thanh vien, thanh van
thanh va » thanh van, hanh va, thanh ha
hang ca » hang va, nang cao, hang tai
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
ty hang » ly hang, ty xang, thi hang
cua tuc » cua duc, cua tu, luat tuc
bach ty » sach ty, xach tay, bach thu
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 ((thanh ve) or (thanh va)) ((cua tuc) OR (cua 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 ((thanh ve) OR (thanh va)) ((cua tuc) OR (cua 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 ((thanh ve) or (thanh va)) ((cua tuc) OR (cua thuoc))".
• Adding a wildcard symbol may retrieve word variants: vu bach ty hang ca hoi. hieu van cam duc ban ((thanh ve) or (thanh va)) ((cua tuc) OR (cua thuoc))*.