Perhaps you should try some spelling variations:
ve triet » va trien
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien
vien cac » vien bach, vien dai, vien da
xuc van » duc van, luc van, vuc van
nang xa » nang x, lang xa, nang ma
tu sach » thu sach, su sach, te sach
ve cam » ve cham, ve cac, va cam
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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