Perhaps you should try some spelling variations:
thien van » thi van
ban thanh » ban hanh, ban hang
thanh cac » hanh cac, thanh bac, thanh ca
cua triet » cua viet, su triet, va triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
sang ma » nang ma, sang tao, mang may
tang ma » mang may, tang van
nam luc » nang luc, nhan luc, nam thuc
luc ban » duc ban, cuc ban, luc bat
cac cua » cach cua, cac qua, 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: so sach ky ((sang ma) or (tang ma)) hoi. thien van nam luc ban thanh cac cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((sang ma) OR (tang ma)) hoi. thien van nam luc ban thanh cac cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach ky ((sang ma) or (tang ma)) hoi. thien van nam luc ban thanh cac cua triet*.