Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu ve » hieu va, hieu van
dung ha » dung va, dung he, dung khoa
ky dung » ly dung, ky dang, ky vung
thuc va » thuc vat, thuc dan, thuc day
ve nam » he nam, va nam, le nam
ha hoi » hoa hoi, ha noi, xa hoi

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