Perhaps you should try some spelling variations:
doanh va » doan va, doanh tai, doanh cua
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
danh va » hanh va, anh va, dan va
cau tuc » cau truc, cau tu, cau luc
ve cau » ke cau, va cau, ve cac
tuc va » thuc va, truc va, tuc xa
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((ma hoi) or (mai hoi)). hieu ve cau tuc va ((danh va) OR (doanh va)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((ma hoi) OR (mai hoi)). hieu ve cau tuc va ((danh va) OR (doanh va)) cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((ma hoi) or (mai hoi)). hieu ve cau tuc va ((danh va) OR (doanh va)) cua su".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (mai hoi)). hieu ve cau tuc va ((danh va) OR (doanh va)) cua su*.