Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hai cua » thai cua, dai cua, hoi cua
va kinh » va tinh, qua kinh
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ve cham » va cham, ve chat, vu cham

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 ve cham soc ((va hanh) or (va kinh)) hai 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 ve cham soc ((va hanh) OR (va kinh)) hai 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 ve cham soc ((va hanh) or (va kinh)) hai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cham soc ((va hanh) or (va kinh)) hai cua triet*.