Perhaps you should try some spelling variations:
cua triet » su triet, va triet
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
va nam » van 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: so sach van nang xa hoi. hieu ((va nam) OR (ha nam)) thuc dan hanh vai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach van nang xa hoi. hieu ((va nam) OR (ha nam)) thuc dan hanh vai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach van nang xa hoi. hieu ((va nam) OR (ha nam)) thuc dan hanh vai ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: so sach van nang xa hoi. hieu ((va nam) OR (ha nam)) thuc dan hanh vai ((cua triet) or (cua viet))*.