Perhaps you should try some spelling variations:
bieu hien » dieu hien, bien phien, bien nien
tu sach » thu sach, te sach, tu cach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cac tuc » cac toc, cac tu, cac tac
luu tre » luu tru, cuu tre, luy tre
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa
vi luu » vi lua
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 sach) or (su sach)) ky nang x hoi. ((bieu hien) OR (dieu khien)) cac tuc va danh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. ((bieu hien) OR (dieu khien)) cac tuc va danh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang x hoi. ((bieu hien) OR (dieu khien)) cac tuc va danh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. ((bieu hien) OR (dieu khien)) cac tuc va danh vi luu tre*.