Perhaps you should try some spelling variations:
su sach » so sach
dao cuu » dao huu, dao cau, dao chu
va hanh » van hanh, va thanh, va danh
va lanh » va lang, va danh, va anh
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, vu khach
cuu tre » cua tre, cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. hieu va cac luc ((va lanh) OR (va hanh)) dao cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky nang xa hoi. hieu va cac luc ((va lanh) or (va hanh)) dao cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky nang xa hoi. hieu va cac luc ((va lanh) or (va hanh)) dao cuu tre*.