Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
thuc va » thuc vat, thuc dan, thuc day
nang xa » nang x, lang xa, nang ma
lang ha » long ha
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (lang ha)) hoi. hieu van tham thuc va thanh vi ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (lang ha)) hoi. hieu van tham thuc va thanh vi ((cua triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (lang ha)) hoi. hieu van tham thuc va thanh vi ((cua triet) or (cua vat))*.