Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cua triet » cua viet, su triet, va triet
vat hanh » vat thanh, van hanh, va hanh
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
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: hoc ((sach ky) or (sach ty)) nang xa hoi. hieu va tham thuc vat hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sach ty)) nang xa hoi. hieu va tham thuc vat hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) or (sach ty)) nang xa hoi. hieu va tham thuc vat hanh vi cua triet*.