Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, cau treo
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
dang vat » dang van, dong vat, dang nhat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
dan vat » van vat, dan va, dan dat
ca tren » cu tren, la tren, co tren
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang xay hoi. hieu van cau xuc va ((dan vat) or (dang vat)) ((cau tren) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xay hoi. hieu van cau xuc va ((dan vat) OR (dang vat)) ((cau tren) OR (ca tren)).
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xay hoi. hieu van cau xuc va ((dan vat) or (dang vat)) ((cau tren) or (ca tren))*.