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
cac duc » cac du, cao duc, cac dac
hieu va » hieu qua
sach ky » sac ky, sach ty, sach kem
nang ho » nang hoc, nang co, tang ho
cua tre » cua te, cuu tre, cua triet
ho hoi » hoc hoi, hoa hoi, hoi hoi

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 hoi. ((hieu va) OR (lieu va)) cac 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 hoi. ((hieu va) OR (lieu va)) cac 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 hoi. ((hieu va) OR (lieu va)) cac duc manh hanh thai cua tre*".