Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
van dung » xay dung, tin dung
cham tuc » nham thuc, pham thuc, tham thuc
cac khoi » cac thoi, cac khoan, cach thoi
dang cac » dung cac, bang cac, dong cac
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
ky dang » ky nang, ky danh
cuu tre » cua tre, cau treo
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky dang cac khoi. hieu ve cham tuc ((van dung) OR (van dong)) tai ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky dang cac khoi. hieu ve cham tuc ((van dung) OR (van dong)) tai ((cuu tre) or (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: su sac ky dang cac khoi. hieu ve cham tuc ((van dung) OR (van dong)) tai ((cuu tre) or (cau tren))*.