Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
doanh vai » doanh tai, doanh va, doanh van
viec cac » vien cac, viec cua, viec lam
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
lo van » vo van, so van, do van

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) lang xa hoi. nhieu viec cac ((lo van) OR (le van)) doanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) lang xa hoi. nhieu viec cac ((lo van) OR (le van)) doanh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) lang xa hoi. nhieu viec cac ((lo van) OR (le van)) doanh vai cuu tre*".