Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » cua viet, su triet
phan lap » phan dau
toc sach » hoc sach, doc sach, thuoc sach
nang hoi » nang noi, nang hoc, nang ho
va triet » va thiet, va trien, ve triet
hoi hoi » hoi hoc, hoc hoi, hoi doi
hieu vu » hieu va, hieu ve, hieu su
vu nham » vu kham, vu cham, sua nham
sach ty » sach y, sach tu, sach thu
thuc va » thuc vat, thuc dan, thuc day
va phan » van phan, va phat, va phap
ty nang » ky nang, ty xang, ty hang

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 hoi hoi. hieu vu nham thuc va phan lap ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang hoi hoi. hieu vu nham thuc va phan lap ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang hoi hoi. hieu vu nham thuc va phan lap ((cua triet) or (va triet))*.