Perhaps you should try some spelling variations:
ve triet » va trien, su triet
nang xa » nang x, lang xa, mang xa
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ty ((nang xa) or (nang ma)) hoi. hieu va cam xuc va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty ((nang xa) OR (nang ma)) hoi. hieu va cam xuc va hanh vi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty ((nang xa) or (nang ma)) hoi. hieu va cam xuc va hanh vi ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty ((nang xa) or (nang ma)) hoi. hieu va cam xuc va hanh vi ve triet*.