Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
cham thuc » nham thuc, pham thuc, tham thuc
nang hoi » nang noi, nang hoc, nang ho
vat phan » va phan, van phan, sat phan
phan lap » phan dau
va triet » va thiet, va trien, ve triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hoi hoi » hoi hoc, hoc hoi, hoi doi
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham

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