Perhaps you should try some spelling variations:
su sach » so sach
vu sach » vu bach, vu khach
dinh de » dinh ve, dinh du, dinh le
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
de cua » le cua, te cua, dieu cua
tuc va » thuc va, truc va, tuc xa
ve cac » va cac, vien cac
xac va » tac va, ac va, bac va
v nang » va nang, vu nang, van nang
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: ((su sach) OR (vu sach)) v nang xa hoi. hieu ve cac ((xac va) or (tuc va)) dinh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) v nang xa hoi. hieu ve cac ((xac va) OR (tuc va)) dinh de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) v nang xa hoi. hieu ve cac ((xac va) or (tuc va)) dinh de cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) v nang xa hoi. hieu ve cac ((xac va) or (tuc va)) dinh de cua te*.