Perhaps you should try some spelling variations:
nhan duc » nhan duoc, nhan luc, phan duc
van hanh » van thanh, ban hanh, van anh
hieu ca » hieu cac, hieu cua, hieu va
duc van » duc va, duc tan, duc manh
sac ky » cac ky
de cua » te cua, dieu cua
le cua » ly cua
x hoi » xa hoi, o hoi, x ho

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: te ((sai ky) OR (sac ky)) nang x hoi. hieu ca nhan duc van hanh ((de cua) OR (le cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sai ky) or (sac ky)) nang x hoi. hieu ca nhan duc van hanh ((de cua) OR (le cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sai ky) or (sac ky)) nang x hoi. hieu ca nhan duc van hanh ((de cua) OR (le cua)) tre*.