Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
sach kem » hanh kem
hanh tai » thanh tai, hang tai, han tai
duc manh » suc manh, duc anh, duc minh
tai cua » thai cua, tai cuc, tri cua
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
hoc hoi » hoc khoi, hoc hoa, hoc noi
cua tre » cua te, cuu tre, cua triet
ho hoi » hoa hoi, hoi hoi, co 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 kem) or (sach y)) nang ((ho hoi) OR (hoc hoi)). hieu va cac duc manh hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach kem) OR (sach y)) nang ((ho hoi) OR (hoc hoi)). hieu va cac duc manh hanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach kem) or (sach y)) nang ((ho hoi) OR (hoc hoi)). hieu va cac duc manh hanh tai cua tre*".