Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
duc manh » suc manh, duc anh, duc minh
thai cua » than cua, tai cuc, tri cua
thu san » thuy san, thu ban, phu san
hieu va » lieu va, hieu qua
duc van » duc va, duc tan, duc phan
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
o lai » o lao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (thu san)) ky nang o lai. hieu va cac ((duc van) OR (duc manh)) nhanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (thu san)) ky nang o lai. hieu va cac ((duc van) OR (duc manh)) nhanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (thu san)) ky nang o lai. hieu va cac ((duc van) OR (duc manh)) nhanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (thu san)) ky nang o lai. hieu va cac ((duc van) OR (duc manh)) nhanh thai cua tre*.