Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien cac » vien cac, dien cac, bien cac
vu sach » vu bach, su sach, vu khach
ty nang » ky nang, ty hang, ly nang
toc van » hoc van, tac van, oc van
hanh ki » hanh vi, hanh ky, hanh kien
su tien » su kien, su hien, tu tieng
ki su » ky su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ty nang) or (ty xang)) xa hoi. thieu nien cac ((toc van) or (toc san)) hanh ki su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty nang) OR (ty xang)) xa hoi. thieu nien cac ((toc van) OR (toc san)) hanh ki su tien.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty nang) or (ty xang)) xa hoi. thieu nien cac ((toc van) or (toc san)) hanh ki su tien*.