Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
nang doc » nang luc
tap cua » tap quan, tiep cua
lai cua » dai cua, hai cua, lai chau
va phan » van phan, va phat, va phap
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
hieu vu » hieu va, hieu ve, hieu su
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: su sach tu ((nang doc) or (nang cao)) hoc. hieu vu nham thuc va phan ((lai cua) or (tap cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu ((nang doc) OR (nang cao)) hoc. hieu vu nham thuc va phan ((lai cua) OR (tap cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach tu ((nang doc) or (nang cao)) hoc. hieu vu nham thuc va phan ((lai cua) or (tap cua)) triet*.