Perhaps you should try some spelling variations:
hien bien » dien bien, khien dien, hien nhien
cua viet » ca viet, hoa viet, cua vat
hanh tai » thanh tai, hang tai, han tai
bien cac » vien cac, dien cac, bien ca
te sach » toc sach
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, su sach, tu cach
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
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 (te sach)) y nang x hoi. hien bien cac xuc va ((hanh tai) or (hanh vi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang x hoi. hien bien cac xuc va ((hanh tai) OR (hanh vi)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) y nang x hoi. hien bien cac xuc va ((hanh tai) or (hanh vi)) cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) y nang x hoi. hien bien cac xuc va ((hanh tai) or (hanh vi)) cua viet*.