Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
sach thu » sach thue, sach thieu, sach tham
nam thuc » nam thuoc, am thuc, nam thu
cam tuc » cam xuc, cam tu, dam thuc
hanh va » hang va, hanh vi
sach tu » cach tu, sach ty, sach uu
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
va cua » va chua, via cua, ca cua

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 tu) or (sach thu)) van xay hoi. hieu ve ((cam tuc) or (nam thuc)) ban hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach thu)) van xay hoi. hieu ve ((cam tuc) OR (nam thuc)) ban hanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach thu)) van xay hoi. hieu ve ((cam tuc) or (nam thuc)) ban hanh va cua triet*.