Perhaps you should try some spelling variations:
hanh day » hanh may, han day, hanh dao
nang dai » nang dau, nang tai, lang dai
so sach » so sanh, co sach, hoc sach
day cua » dai cua
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
dai hoa » dai khoa, dai hoc, dai hoi
bo sach » co sach, hoc sach
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (bo sach)) ky nang dai hoa. ((hieu ve) or (hieu qua)) cam tuc va hanh day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ky nang dai hoa. ((hieu ve) OR (hieu qua)) cam tuc va hanh day cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) ky nang dai hoa. ((hieu ve) or (hieu qua)) cam tuc va hanh day cua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (bo sach)) ky nang dai hoa. ((hieu ve) or (hieu qua)) cam tuc va hanh day cua tre*.