Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh ve » hanh vi, hanh va, hanh kem
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
sach v » sach va, sach y, sach 2
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va
v nang » va nang, vu nang, van nang
ve su » va su

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 v nang xa hoi. hieu ((va cam) or (ve cac)) ((xuc va) OR (duc va)) hanh ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang xa hoi. hieu ((va cam) OR (ve cac)) ((xuc va) OR (duc va)) hanh ve su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang xa hoi. hieu ((va cam) or (ve cac)) ((xuc va) OR (duc va)) hanh ve su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang xa hoi. hieu ((va cam) or (ve cac)) ((xuc va) OR (duc va)) hanh ve su triet*.