Perhaps you should try some spelling variations:
san thanh » ban thanh, van thanh, son thanh
san hanh » ban hanh, van hanh, dan hanh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
ve cai » va cai, ve cac, ve tai
xac ky » cac ky, sac ky, bac ky
ve cap » ve cac, le cap, ve cau
de cua » le cua, te cua, dieu cua
su xac » pu xac, su cac

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

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