Perhaps you should try some spelling variations:
su triet » su tien, ve triet
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
sach vu » sach tu, sach uu, sach xu
xuc van » duc van, luc van, xuc ban
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach va » sach xa, sach ha, sach dao
su viet » so viet

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