Perhaps you should try some spelling variations:
thanh sang » thanh san, thanh hang, thanh hoang
hieu viec » nhieu viec, hieu ve, sieu viet
can thanh » ban thanh, van thanh, cac thanh
cua viet » ca viet, hoa viet, cua vat
sang cua » mang cua, song cua, hang cua
viec cac » vien cac, viec cua, viec lam
ty hang » ly hang, thi hang, thu hang
cac hoc » cach hoc, cac hop, bac hoc
hoc can » hoc dan, hoc cao, hoc cac
ty nang » ky nang, ly nang, ty nong
vu sach » vu bach, su sach, vu khach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((((ty nang) or (ty xang))) or (ty hang)) xa hoi. hieu viec cac hoc can thanh sang cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((((ty nang) OR (ty xang))) OR (ty hang)) xa hoi. hieu viec cac hoc can thanh sang cua viet.
• Adding a wildcard symbol may retrieve word variants: vu sach ((((ty nang) or (ty xang))) or (ty hang)) xa hoi. hieu viec cac hoc can thanh sang cua viet*.