Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cua viet » ca viet, hoa viet, cua vat
tham soc » tham nuoc, thai son, ham so
danh vai » danh sai, danh va, dang van
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. lieu va ((tham soc) or (cham soc)) va ((danh vai) OR (doanh van)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. lieu va ((tham soc) OR (cham soc)) va ((danh vai) OR (doanh van)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. lieu va ((tham soc) or (cham soc)) va ((danh vai) OR (doanh van)) cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. lieu va ((tham soc) or (cham soc)) va ((danh vai) OR (doanh van)) cua viet*.