Perhaps you should try some spelling variations:
dung cong » dung trong
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
xuc xay » xuc hay, xuat xay, thuc xay
tuc xay » thuc xay, tuc xa, tu xay
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 ky nang xa hoi. hieu ve cam ((xuc xay) OR (tuc xay)) dung cong ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ve cam ((xuc xay) OR (tuc xay)) dung cong ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ve cam ((xuc xay) OR (tuc xay)) dung cong ((cua tre) or (cuu tre))*".