Perhaps you should try some spelling variations:
phan thuc » nhan thuc, phap thuc, pham thuc
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ke » hieu kem, chieu ke, hieu ky
ke phan » ve phan, kenh phan, ke thang
dan dan » dang dan, ban dan, dao dan
dan lat » dan luat, dan dat, dan lap
lat cua » luat cua, lai cua, mat cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, 5 hoi

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 ky nang ((x hoi) or (x ho)). hieu ke phan thuc dan dan lat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x hoi) OR (x ho)). hieu ke phan thuc dan dan lat cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) or (x ho)). hieu ke phan thuc dan dan lat cua tre*.