Perhaps you should try some spelling variations:
bien cac » dien cac, bien ca, hien cac
vien cac » vien bach, vien dai, vien da
hanh tai » thanh tai, hang tai, han tai
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang x ho. hien ((bien cac) OR (vien cac)) xuc va ((hanh tai) or (hanh vi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x ho. hien ((bien cac) OR (vien cac)) xuc va ((hanh tai) OR (hanh vi)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x ho. hien ((bien cac) OR (vien cac)) xuc va ((hanh tai) or (hanh vi)) cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x ho. hien ((bien cac) OR (vien cac)) xuc va ((hanh tai) or (hanh vi)) cua viet*.