Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
va trien » va truyen, va thiet, va tuyen
va thanh » gia thanh, ban thanh, le thanh
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
hieu va » lieu va, hieu qua
va tinh » may tinh
moi va » hoi va, mai va, moi ve
te san » te ban, ke san, tu san
ha hoi » hoa hoi, ha noi, xa hoi
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ((ky lang) or (ky tang)) ha hoi. hieu va nam thuoc ((va thanh) OR (va tinh)) moi va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ((ky lang) OR (ky tang)) ha hoi. hieu va nam thuoc ((va thanh) OR (va tinh)) moi va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ((ky lang) or (ky tang)) ha hoi. hieu va nam thuoc ((va thanh) OR (va tinh)) moi va trien".
• Adding a wildcard symbol may retrieve word variants: te san ((ky lang) or (ky tang)) ha hoi. hieu va nam thuoc ((va thanh) OR (va tinh)) moi va trien*.