Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, cuoc cach, cuon sach
manh hanh » xanh hanh, danh thanh, minh thanh
hieu van » hieu va, thien van, lieu va
hoc sach » hoc sinh, hoc cac, hoc anh
hanh vai » hanh vi, hanh va, hanh tai
xuc manh » suc manh, duc manh, duc minh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nuoc sach) OR (hoc sach)) tu nang xa hoi. ((hieu ve) or (hieu van)) cam xuc manh hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (hoc sach)) tu nang xa hoi. ((hieu ve) OR (hieu van)) cam xuc manh hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) OR (hoc sach)) tu nang xa hoi. ((hieu ve) or (hieu van)) cam xuc manh hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) OR (hoc sach)) tu nang xa hoi. ((hieu ve) or (hieu van)) cam xuc manh hanh vai cua tre*.