Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
phan thuc » nhan thuc, phap thuc, pham thuc
toc sach » hoc sach, doc sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
lap chau » lai chau, mai chau, a chau
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
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 lap » phan lap, dan luan
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: toc sach ty nang ((x hoi) or (x ho)). hieu ke phan thuc dan dan lap chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang ((x hoi) OR (x ho)). hieu ke phan thuc dan dan lap chau triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang ((x hoi) or (x ho)). hieu ke phan thuc dan dan lap chau triet*.