Perhaps you should try some spelling variations:
sach daon » sach danh, sach dat, sach han
sach dao » lanh dao
van hanh » van thanh, ban hanh, van anh
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
su viet » so viet
su tien » su kien, su hien, tu tieng
ve cam » ve cham, ve cac, va cam

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