Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
khoa hoi » khoan hoi, khoa hoc, khoa doi
tap cua » tap quan, tiep cua
lap cua » lai cua, lam cua, ap cua
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
hoa hoi » hoa hoc, hoa doi, hoc 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 ((hoa hoi) or (khoa hoi)). hieu vu nham thuc va phan ((lap cua) OR (tap cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((hoa hoi) OR (khoa hoi)). hieu vu nham thuc va phan ((lap cua) OR (tap cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((hoa hoi) or (khoa hoi)). hieu vu nham thuc va phan ((lap cua) OR (tap cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((hoa hoi) or (khoa hoi)). hieu vu nham thuc va phan ((lap cua) OR (tap cua)) triet*.