Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
thu sach » tu sach, thuat sach, thuoc sach
tang ma » mang may, tang van
sach ky » sac ky, sach y, sach ty
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
duc van » duc va, duc tan, duc manh
nang ma » sang ma, nang cao, mang may
tai cua » thai cua, tai cuc, tri cua

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 ((((nang ma) OR (tang ma))) or (nang x)) hoi. hieu vu cham duc van hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((((nang ma) OR (tang ma))) OR (nang x)) hoi. hieu vu cham duc van hanh tai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((((nang ma) OR (tang ma))) or (nang x)) hoi. hieu vu cham duc van hanh tai cua triet*".