Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
doanh va » doan va, doanh tai, doanh cua
sach tu » sach thu, cach tu, sach ty
danh va » hanh va, anh va, dan va
te sach » toc sach
tu nang » tru nang, tu nong, tu nano
ve cam » ve cham, ve cac, va cam
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 tu nang x hoi. hieu ((ve cam) or (vien cac)) duc va ((danh va) OR (doanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang x hoi. hieu ((ve cam) OR (vien cac)) duc va ((danh va) OR (doanh va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang x hoi. hieu ((ve cam) or (vien cac)) duc va ((danh va) OR (doanh va)) cua te".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang x hoi. hieu ((ve cam) or (vien cac)) duc va ((danh va) OR (doanh va)) cua te*.