Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
ban nhanh » ban hanh, ban thanh, ban nhan
cua tre » cua te, cuu tre, cua triet
cao duc » dao duc, cao suc, giao duc
hai cua » thai cua, dai cua, hoi cua
cam duc » cam xuc, pham duc, nam duoc
hieu ve » hieu va, hieu van
ky lang » ky dang, ky tang, tay lang
su sac » su sach, su cac, su xac

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 lang) OR (ky nang)) xa hoi. hieu ve ((cam duc) or (cao duc)) ban nhanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky lang) OR (ky nang)) xa hoi. hieu ve ((cam duc) OR (cao duc)) ban nhanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky lang) OR (ky nang)) xa hoi. hieu ve ((cam duc) or (cao duc)) ban nhanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky lang) OR (ky nang)) xa hoi. hieu ve ((cam duc) or (cao duc)) ban nhanh hai cua tre*.