Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
hoc thuc » hoc huu
hanh lai » hanh lam, hanh tai, thanh lap
sach thu » sach thieu, sach tham, cach thuc
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
lai cua » dai cua, hai cua, lai chau
hieu va » lieu va, hieu qua
sach tu » cach tu, sach ty, sach uu
cua tre » cua te, cuu tre, cua triet
va hoc » van hoc
x hoi » xa hoi, o hoi, x ho

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 tu) or (((sach thu) OR (sach thue)))) nang x hoi. hieu va hoc thuc day hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (((sach thu) OR (sach thue)))) nang x hoi. hieu va hoc thuc day hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) or (((sach thu) OR (sach thue)))) nang x hoi. hieu va hoc thuc day hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) or (((sach thu) OR (sach thue)))) nang x hoi. hieu va hoc thuc day hanh lai cua tre*.