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