Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
vien cac » vien dai, vien da, gian cac
anh van » anh va, thanh van, doanh van
anh vai » anh va, anh bai, anh tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
tuc va » thuc va, truc va, tuc xa

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 dang xa hoi. hieu ((vien cac) or (vien bach)) tuc va ((anh vai) OR (anh van)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xa hoi. hieu ((vien cac) OR (vien bach)) tuc va ((anh vai) OR (anh van)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xa hoi. hieu ((vien cac) or (vien bach)) tuc va ((anh vai) OR (anh van)) va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xa hoi. hieu ((vien cac) or (vien bach)) tuc va ((anh vai) OR (anh van)) va triet*.