Perhaps you should try some spelling variations:
bach thuc » cach thuc, bach thu, thach thuc
thanh lap » thanh san, phan lap, thanh hai
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
ve bach » ve cach, vu bach, vi bach
thuc va » thuc vat, thuc dan, thuc day
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly nang ((x hoi) OR (o hoi)). hieu ve bach thuc va thanh lap cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang ((x hoi) OR (o hoi)). hieu ve bach thuc va thanh lap cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang ((x hoi) OR (o hoi)). hieu ve bach thuc va thanh lap cua tre*.