Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
manh hanh » xanh hanh, danh thanh, minh thanh
thai cua » than cua, tai cuc, tri cua
duc manh » suc manh, duc anh, duc minh
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
sach ty » sach tu, sach thu, xach tay
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) OR (sach y)) sang ((ma hoa) or (xa hoi)). hieu ve cac duc manh hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) sang ((ma hoa) OR (xa hoi)). hieu ve cac duc manh hanh thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) sang ((ma hoa) or (xa hoi)). hieu ve cac duc manh hanh thai cua tre*".