Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
cac thuc » cach thuc, cac thu, can thuc
day hanh » day thanh, dao hanh, day manh
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 ((day hanh) OR (day nhanh)) 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 ((day hanh) OR (day nhanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach thu nang xa hoi. hieu va cac thuc ((day hanh) OR (day nhanh)) vai cua tre*.