Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, mang may
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
vi cua » vai cua, di 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 (nang cao)) hoa. hieu va pham thuc dan hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang ma) OR (nang cao)) hoa. hieu va pham thuc dan hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang ma) or (nang cao)) hoa. hieu va pham thuc dan hanh vi cua triet*.