Perhaps you should try some spelling variations:
dang xay » dang van, van xay
van dung » van dong, xay dung, tin dung
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
va dung » va duong, vat dung, va ung
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cam » va cham, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang xay hoi. hieu ((va cam) or (va cac)) tuc ((va dung) OR (van dung)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xay hoi. hieu ((va cam) OR (va cac)) tuc ((va dung) OR (van dung)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang xay hoi. hieu ((va cam) or (va cac)) tuc ((va dung) OR (van dung)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xay hoi. hieu ((va cam) or (va cac)) tuc ((va dung) OR (van dung)) tai cua tre*.