Perhaps you should try some spelling variations:
nguoi san » nguoi tay, nguoi dao, nguoi ma
cap nguoi » ca nguoi, gap nguoi, giap nguoi
san hanh » san thanh, ban hanh, van hanh
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
te cua » tue cua, le cua
de cua » le cua, dieu cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve cap » ve cac, le cap, ve cai

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) OR (nang x)) hoi. hieu ve cap nguoi san hanh ((de cua) or (te cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((nang xa) OR (nang x)) hoi. hieu ve cap nguoi san hanh ((de cua) OR (te cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((nang xa) OR (nang x)) hoi. hieu ve cap nguoi san hanh ((de cua) or (te cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((nang xa) OR (nang x)) hoi. hieu ve cap nguoi san hanh ((de cua) or (te cua)) tre*.