Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh sai » dung sai, danh bat, danh dau
khoa doi » khoa hoi, khoa noi, khoan hoi
thuc dan » thuc hanh, hoc dan, thuc vat
sai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc day
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
hoa doi » hoa dai, hoc doi, xoa doi
ty lang » tay lang, ty xang, ty hang
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty lang ((hoa doi) or (khoa doi)). hieu va nam ((thuc va) OR (thuc dan)) danh sai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty lang ((hoa doi) OR (khoa doi)). hieu va nam ((thuc va) OR (thuc dan)) danh sai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty lang ((hoa doi) or (khoa doi)). hieu va nam ((thuc va) OR (thuc dan)) danh sai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang ((hoa doi) or (khoa doi)). hieu va nam ((thuc va) OR (thuc dan)) danh sai cua triet*.