Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
danh sai » dung sai, danh bat, danh dau
danh dai » danh dau, danh di, vanh dai
thuc day » thuc dan, thuc vat
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hoa hoi » khoa hoi, hoa hoc, hoa doi
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
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 nang) OR (ty hang)) hoa hoi. hieu va nam thuc day ((danh dai) or (danh sai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) hoa hoi. hieu va nam thuc day ((danh dai) OR (danh sai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) hoa hoi. hieu va nam thuc day ((danh dai) or (danh sai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty hang)) hoa hoi. hieu va nam thuc day ((danh dai) or (danh sai)) cua triet*.