Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tham thuc » nham thuc, pham thuc, tam thuc
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
thuc ban » thuoc ban, thuc dan, thu ban
sang ma » tang ma, sang tao, mang may
sach ky » sac ky, sach y, sach kem
nang ma » tang ma, nang cao, mang may
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai 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) or (sach ty)) ((nang ma) or (sang ma)) hoi. hieu va tham thuc ban hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) ((nang ma) OR (sang ma)) hoi. hieu va tham thuc ban hanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach ty)) ((nang ma) or (sang ma)) hoi. hieu va tham thuc ban hanh vai cua triet*.