Perhaps you should try some spelling variations:
van dung » van dong, xay dung, tin dung
nam thuc » nam thuoc, nam thu, nam tu
cua tre » cua te, cuu tre, cua triet
dung ca » dung cua, dung cac, dung cam
hieu ve » hieu va, hieu van
ca phoi » cap phoi, cay phoi, gap phoi
dang ca » dang cac, dan ca, hang ca
ky dang » ky nang, ky danh
do dai » co dai
ca cua » co cua
so dai » si dai, co dai, so dac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so dai) OR (do dai)) ky dang ca phoi. hieu ve ((nam thuc) or (am thuc)) van dung ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so dai) OR (do dai)) ky dang ca phoi. hieu ve ((nam thuc) OR (am thuc)) van dung ca cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so dai) OR (do dai)) ky dang ca phoi. hieu ve ((nam thuc) or (am thuc)) van dung ca cua tre*".