Perhaps you should try some spelling variations:
phan thuc » nhan thuc, phap thuc, pham thuc
toc sach » hoc sach, doc sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
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 lai » dan loai, dan lap, dan lat
chau te » chau tho
5 hoi » o 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 ly nang ((5 hoi) or (x ho)). hieu ke phan thuc dan dan lai chau te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ly nang ((5 hoi) OR (x ho)). hieu ke phan thuc dan dan lai chau te.
• Adding a wildcard symbol may retrieve word variants: toc sach ly nang ((5 hoi) or (x ho)). hieu ke phan thuc dan dan lai chau te*.