Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
pham thuc » phap thuc, pham chuc, nham thuc
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
sach ky » sach y, sach ty, sach kem
nang ma » tang ma, sang ma, mang may
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
sac ky » cac ky, sai ky
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) OR (sac 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) OR (sac ky)) ((nang ma) OR (nang cao)) hoa. hieu va pham thuc dan hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sac 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) OR (sac ky)) ((nang ma) or (nang cao)) hoa. hieu va pham thuc dan hanh vi cua triet*.