Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
duc manh » suc manh, duc anh, duc minh
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc phan
hieu ve » hieu va, hieu van
nang ra » nang ma, lang ra, nang ro
ve cac » va cac, vien cac
ra lai » ra glai, ru lai, va lai
tu san » thu san, tu ban, tu can
tu sac » tu sach, tu cac, tu bac

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

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