Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
cac thuc » cac thu, can thuc, cay thuc
day hanh » day nhanh, day thanh, dao hanh
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
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: te sach thu nang xa hoi. hieu va ((cac thuc) OR (cach thuc)) day hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu nang xa hoi. hieu va ((cac thuc) OR (cach thuc)) day hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach thu nang xa hoi. hieu va ((cac thuc) OR (cach thuc)) day hanh vai cua tre*.