Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
viec cac » vien cac, viec cua, ve cac
viec va » vien va, viec cua
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu 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 ty nang x hoi. hieu ((viec cac) or (((viec lam) OR (viec va)))) nuoc va thanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((viec cac) OR (((viec lam) OR (viec va)))) nuoc va thanh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu ((viec cac) or (((viec lam) OR (viec va)))) nuoc va thanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((viec cac) or (((viec lam) OR (viec va)))) nuoc va thanh vi va triet*.