Perhaps you should try some spelling variations:
dang xay » dang van, van xay
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cua tre » cuu tre, cua triet, dua tren
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
cua te » cua tu

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 dang xay hoi. hieu va cac xuc ((ban hanh) or (gia thanh)) vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xay hoi. hieu va cac xuc ((ban hanh) OR (gia thanh)) vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xay hoi. hieu va cac xuc ((ban hanh) or (gia thanh)) vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. hieu va cac xuc ((ban hanh) or (gia thanh)) vi ((cua tre) OR (cua te))*.