Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, cay thuc
can thuc » dan thuc, van thuc, cay thuc
day dang » da dang, dai dang, day dan
hieu va » lieu va, hieu qua
vu sai » vu hai, vu san, vu dai
sai ky » sac ky
de cua » le cua, dieu cua
te cua » tue cua, le cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sai ky nang x hoi. hieu va ((cac thuc) or (can thuc)) day dang ((de cua) OR (te cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang x hoi. hieu va ((cac thuc) OR (can thuc)) day dang ((de cua) OR (te cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sai ky nang x hoi. hieu va ((cac thuc) or (can thuc)) day dang ((de cua) OR (te cua)) tre".
• Adding a wildcard symbol may retrieve word variants: vu sai ky nang x hoi. hieu va ((cac thuc) or (can thuc)) day dang ((de cua) OR (te cua)) tre*.