Perhaps you should try some spelling variations:
bien viet » dien viet, tieng viet, trien viet
viet cac » vien cac, viet ca, viet bac
tu sach » thu sach, su sach, tu cach
hanh di » hanh vi, hanh de, hang di
nang xa » nang x, lang xa, nang ma
te sach » toc sach
y nang » ky nang, ly nang, v nang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua
cua te » cua tu

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 xa hoi. bien viet cac ((xuc va) or (tuc va)) hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang xa hoi. bien viet cac ((xuc va) OR (tuc va)) hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) y nang xa hoi. bien viet cac ((xuc va) or (tuc va)) hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) y nang xa hoi. bien viet cac ((xuc va) or (tuc va)) hanh di cua te*.