Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hoc quoc » hoc nuoc, hoc duoc, hoc thuoc
viec hoc » viec doc, viec khoa, viec nhom
quoc va » nuoc va, duoc va, quoc gia
tu cach » tu cac
ty hang » ly hang, ty xang, thi hang
su sach » so sach, vu sach
x hoi » xa hoi, o hoi, 5 hoi
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 cach) or (su sach)) ty hang ((x hoi) OR (x ho)). hieu viec hoc quoc va thanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ty hang ((x hoi) OR (x ho)). hieu viec hoc quoc va thanh vi va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ty hang ((x hoi) OR (x ho)). hieu viec hoc quoc va thanh vi va triet*".