Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
khanh vi » hanh vi, khanh v, nhanh vi
xa khanh » xa thanh, van khanh, dat khanh
nam truc » nam truoc, nam thuc, nam trung
cuu tre » cua tre, cau tren, cau treo
nam tuc » nam thuc, nam tu, nam thuoc
sac ky » cac ky
vi cuu » vi luu, vinh cuu
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: tu ((sac ky) or (sai ky)) nang x hoi. hieu van ((nam tuc) OR (nam truc)) xa khanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang x hoi. hieu van ((nam tuc) OR (nam truc)) xa khanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sai ky)) nang x hoi. hieu van ((nam tuc) OR (nam truc)) xa khanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) nang x hoi. hieu van ((nam tuc) OR (nam truc)) xa khanh vi cuu tre*.