Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
thi hanh » thi thanh
hanh vai » hanh vi, hanh va, hanh tai
sach thi » sach thu, sach tai, sach thieu
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
hanh ma » hanh mau, hanh may, hanh va
ve nam » he nam, le nam, te nam
ma hoi » mai hoi, xa hoi, ma hoa
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 thi hanh ma hoi. hieu ((ve nam) or (va nam)) thuc va hanh vai ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh ma hoi. hieu ((ve nam) OR (va nam)) thuc va hanh vai ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh ma hoi. hieu ((ve nam) or (va nam)) thuc va hanh vai ((cua triet) or (va triet))*.