Perhaps you should try some spelling variations:
su triet » su viet, ve triet
van hanh » van thanh, ban hanh, van anh
sach xan » sach han, sach san, sach danh
xuc van » duc van, luc van, xuc ban
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
sach xa » sach dao, sach nha, sach bai
su tien » su kien, su hien, tu tieng
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac

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 xan) or (sach xa)) nang ma hoi. hieu ve cac xuc van hanh vi ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach xan) OR (sach xa)) nang ma hoi. hieu ve cac xuc van hanh vi ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach xan) or (sach xa)) nang ma hoi. hieu ve cac xuc van hanh vi ((su triet) or (su tien))*.