Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
phan lap » phan dau
day phan » dam phan, duy phan, dan phan
thuc day » thuc dan, thuc vat
vu nham » vu kham, vu cham, sua nham
sach ty » sach y, sach thu, xach tay
nang ho » nang hoc, nang co, tang ho
sach tu » sach thu, cach tu, sach uu
hieu vu » hieu va, hieu ve, hieu su
ho hoi » hoc hoi, hoa hoi, hoi hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) or (sach tu)) nang ho hoi. hieu vu nham thuc day phan lap ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tu)) nang ho hoi. hieu vu nham thuc day phan lap ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) or (sach tu)) nang ho hoi. hieu vu nham thuc day phan lap ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach tu)) nang ho hoi. hieu vu nham thuc day phan lap ((cua triet) OR (cua viet))*.