Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
duc manh » suc manh, duc anh, duc minh
thai cua » than cua, tai cuc, tri cua
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc phan
cua tre » cua te, cuu tre, cua triet
su sai » su tai, su hai, su dai
sai ky » sac ky

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

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