Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, thieu nien
dinh vai » dinh van, dinh vi, dinh va
bach hoa » bach khoa, bach ha, cach hoan
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
bach lo » sach lo, bach mao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang xa) OR (nang ma)) hoi. hieu vien ((bach lo) or (bach hoa)) va dinh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang ma)) hoi. hieu vien ((bach lo) OR (bach hoa)) va dinh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (nang ma)) hoi. hieu vien ((bach lo) or (bach hoa)) va dinh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (nang ma)) hoi. hieu vien ((bach lo) or (bach hoa)) va dinh vai cua triet*.