Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang van » hoang van, hang va
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
van hoe » van hoa, van hoc, van hieu
sach ky » sach y, sach ty, sach kem
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
cua tre » cua te, cuu tre, dua tren
sac ky » cac ky, sai ky

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 ky) OR (sac ky)) dang van hoe. hieu van nam thuc va danh va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) dang van hoe. hieu van nam thuc va danh va ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) dang van hoe. hieu van nam thuc va danh va ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sac ky)) dang van hoe. hieu van nam thuc va danh va ((cua tre) or (cua triet))*.