Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
hanh ki » hanh vi, hanh ky, hanh kien
su viet » so viet
sach uu » sach luu, sach tu, sach xu
hieu va » hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
uu nang » cuu nang, vu nang, cuu nong

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 uu nang mai hoi. ((hieu va) OR (lieu va)) cam xuc van hanh ki ((ve triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach uu nang mai hoi. ((hieu va) OR (lieu va)) cam xuc van hanh ki ((ve triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach uu nang mai hoi. ((hieu va) OR (lieu va)) cam xuc van hanh ki ((ve triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: tu sach uu nang mai hoi. ((hieu va) OR (lieu va)) cam xuc van hanh ki ((ve triet) or (su viet))*.