Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
dung doi » huong doi, dung tai, dung co
tu sach » thu sach, te sach, tu cach
doi cua » dai cua, hoi cua
vien da » vien dai, hien dai
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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 (tuc va)) dung doi 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 (tuc va)) dung doi 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 (tuc va)) dung doi cua te*.