Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hanh » ban hang
nang mai » nang ma, nang tai, lang mai
hanh ki » hanh vi, hanh ky, hanh kien
cao duc » dao duc, cao suc, giao duc
cao xuc » cam xuc, cao suc, chat xuc
sach vu » sach va, sach tu, sach xu
mai hoi » mai khoi, dai hoi, lai hoi
sach uu » sach luu, sach tu, sach xu
ki su » ky su

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