Perhaps you should try some spelling variations:
doanh va » doanh tai, doanh cua, hanh va
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham tu » pham tu, cam tu, chai tu
danh va » hanh va, anh va, dan va

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 cham tu va ((danh va) or (((doanh va) OR (doan va)))) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ve cham tu va ((danh va) OR (((doanh va) OR (doan va)))) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ve cham tu va ((danh va) or (((doanh va) OR (doan va)))) su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ve cham tu va ((danh va) or (((doanh va) OR (doan va)))) su triet*.