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

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) OR (hoi doi)). 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: te sach ty nang ((hoi hoi) OR (hoi doi)). hieu vu nham thuc va phan lap ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((hoi hoi) OR (hoi doi)). hieu vu nham thuc va phan lap ((cua triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((hoi hoi) OR (hoi doi)). hieu vu nham thuc va phan lap ((cua triet) or (va triet))*.