Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
hoc sach » hoc sinh, hoc cac, hoc anh
duc manh » suc manh, duc anh, duc minh
thu bang » thu ban, thu trang, thai bang
hanh lai » hanh lam, hanh tai, thanh lap
chu bang » chuc nang, chu quang, chu trang
thu hang » thi hang, thuc hanh, thu huong
lai cua » dai cua, hai cua, lai chau
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((((thu bang) OR (chu bang))) or (thu hang)) xa hoi. hieu va cac duc manh hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((((thu bang) OR (chu bang))) OR (thu hang)) xa hoi. hieu va cac duc manh hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((((thu bang) OR (chu bang))) or (thu hang)) xa hoi. hieu va cac duc manh hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((((thu bang) OR (chu bang))) or (thu hang)) xa hoi. hieu va cac duc manh hanh lai cua tre*.