Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
va dinh » van dinh, va kinh, va tinh
su tien » su kien, su hien, tu tieng
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
te sach » toc sach
van am » van nam, van lam, van dam
den su » dan su, nen su
te sac » te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te sach)) ky dang xay hoi. hieu van am thuc ((va dinh) or (xuan dinh)) den su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky dang xay hoi. hieu van am thuc ((va dinh) OR (xuan dinh)) den su tien.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky dang xay hoi. hieu van am thuc ((va dinh) or (xuan dinh)) den su tien*.