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
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach ty, sach kem
nang co » nang cao, nang doc, nang noi
nang ho » nang hoc, tang ho, nang cao
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach y)) ((nang ho) OR (nang co)) hoi. hieu va cao duc manh hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) ((nang ho) OR (nang co)) hoi. hieu va cao duc manh hanh thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) ((nang ho) OR (nang co)) hoi. hieu va cao duc manh hanh thai cua tre*".