Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cuu cach » cuu cac, cuoc cach, cuu dac
va triet » va thiet, va trien, ve triet
cua viet » ca viet, hoa viet, cua vat
tu nano » truc nano
ve tham » va tham, ve cham, vi tham
su sach » so sach, vu sach
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va, hieu van
nano 1 » nano o
1 h » 1 ha, 12 h

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((cuu cach) or (su sach)) tu nano 1 h. hieu ve tham thuc va danh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cuu cach) OR (su sach)) tu nano 1 h. hieu ve tham thuc va danh vi ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((cuu cach) or (su sach)) tu nano 1 h. hieu ve tham thuc va danh vi ((va triet) or (cua viet))*.