Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cua viet » ca viet, hoa viet, cua dieu
cam truc » cau truc, nam truc, lam truoc
sang ky » sang kyo, dang ky, tang ky
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
san ky » van ky, dan ky, ban ky
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((san ky) or (sang ky)) dang xay hoi. hieu va cam truc va hanh vi ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((san ky) OR (sang ky)) dang xay hoi. hieu va cam truc va hanh vi ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: thuat ((san ky) or (sang ky)) dang xay hoi. hieu va cam truc va hanh vi ((cua viet) or (cua vat))*.