Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thuoc sac » thuoc sach, thuoc dac, thuoc sai
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
sac ky » cac ky, sai ky
cac lo » cac lop, cac co, cac bo
lo ban » co ban, lo van, ly ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sac ky ((nang xa) or (nang ma)) hoi. lieu va cac lo ban thanh ((vai cua) OR (hai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky ((nang xa) OR (nang ma)) hoi. lieu va cac lo ban thanh ((vai cua) OR (hai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sac ky ((nang xa) or (nang ma)) hoi. lieu va cac lo ban thanh ((vai cua) OR (hai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky ((nang xa) or (nang ma)) hoi. lieu va cac lo ban thanh ((vai cua) OR (hai cua)) triet*.