Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
va triet » va thiet, va trien, ve triet
hanh vai » hanh vi, hanh tai, hanh van
viec cac » vien cac, viec cua, viec lam
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
vu sach » vu bach, vu khach
hanh va » hang va, hanh vi
su sach » so sach

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