Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
benh dai » benh tai, benh noi, binh dan
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
duc ban » duc tan, dua ban, duc man
duc van » duc va, duc tan, duc manh
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) OR (sach ty)) nang x hoi. hieu va cam ((duc ban) or (duc van)) benh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) nang x hoi. hieu va cam ((duc ban) OR (duc van)) benh dai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach ty)) nang x hoi. hieu va cam ((duc ban) or (duc van)) benh dai cua triet*".