Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
thanh hoa » thanh pho
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham

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 ty nang ma hoa. hieu ve cham thuc vat ((thanh hoa) or (hanh kem)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ma hoa. hieu ve cham thuc vat ((thanh hoa) OR (hanh kem)) cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ma hoa. hieu ve cham thuc vat ((thanh hoa) or (hanh kem)) cua triet*.