Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
bac thuc » bao thuc, bac thua, cach thuc
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
van bac » van ban, van bao, van hac
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh du » danh dau, danh tu, dinh du
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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) or (so sanh)) y nang ma hoi. hieu van bac thuc va danh du ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) y nang ma hoi. hieu van bac thuc va danh du ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) y nang ma hoi. hieu van bac thuc va danh du ((cua tre) OR (cua triet))*".