Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai
ve su » va su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) tuc ((va hanh) or (va danh)) ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) tuc ((va hanh) OR (va danh)) ve su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) tuc ((va hanh) or (va danh)) ve su triet*".