Perhaps you should try some spelling variations:
ve triet » va trien, su triet
nang mai » nang ma, lang mai, nang cai
van hanh » van thanh, ban hanh, van anh
nang tai » hang tai, tang tai, sang tai
hanh ki » hanh vi, hanh ky, hanh kien
xuc van » duc van, luc van, vuc van
sach vu » sach va, sach tu, sach uu
tu sach » thu sach, su sach, te sach
hieu va » hieu qua
ki ve » ke ve, gi ve, vi 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 vu ((nang mai) OR (nang tai)) hoi. ((hieu va) or (lieu va)) cam xuc van hanh ki ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu ((nang mai) OR (nang tai)) hoi. ((hieu va) OR (lieu va)) cam xuc van hanh ki ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach vu ((nang mai) OR (nang tai)) hoi. ((hieu va) or (lieu va)) cam xuc van hanh ki ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach vu ((nang mai) OR (nang tai)) hoi. ((hieu va) or (lieu va)) cam xuc van hanh ki ve triet*.