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