Perhaps you should try some spelling variations:
cap nguoi » ca nguoi, gap nguoi, giap nguoi
san hang » san chang, ban hang, san sang
van hang » van khang, van hoang, van thang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su xac
su cac » tu cac, su cao, su can
ve cap » ve cac, le cap, ve cai
di cua » dai cua, doi cua, de cua

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) or (su cac)) ky nang xa hoi. hieu ve cap nguoi ((san hang) OR (van hang)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su cac)) ky nang xa hoi. hieu ve cap nguoi ((san hang) OR (van hang)) di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su cac)) ky nang xa hoi. hieu ve cap nguoi ((san hang) OR (van hang)) di cua tre*".