Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
tu sach » thu sach, te sach, tu cach
dang de » dang deo, dung de, dang do
vien da » vien dai, hien dai
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
de cua » le cua, te cua, dieu 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 (su sach)) ky nang xa hoi. hieu vien da ((xuc va) OR (luc va)) dang de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu vien da ((xuc va) OR (luc va)) dang de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang xa hoi. hieu vien da ((xuc va) OR (luc va)) dang de cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. hieu vien da ((xuc va) OR (luc va)) dang de cua te*.