Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
hang vi » hang va, hanh vi, hang di
hang ki » hang di, hang ke, hoang kim
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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 ky nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van ((hang ki) or (hang vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van ((hang ki) OR (hang vi)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van ((hang ki) or (hang vi)) su triet*".