Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
nam thuc » am thuc, nam thu, nam tu
ban hanh » ban hang
va trien » va truyen, va thiet, va tuyen
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, dam thuc
hanh va » hang va, hanh vi
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. hieu ve ((cam tuc) or (((nam thuc) OR (nam thuoc)))) ban hanh va va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. hieu ve ((cam tuc) OR (((nam thuc) OR (nam thuoc)))) ban hanh va va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. hieu ve ((cam tuc) or (((nam thuc) OR (nam thuoc)))) ban hanh va va trien".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. hieu ve ((cam tuc) or (((nam thuc) OR (nam thuoc)))) ban hanh va va trien*.