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