Perhaps you should try some spelling variations:
doanh huong » doanh thuong, doan huong, anh huong
huong cua » dung cua
voi doanh » von doanh, tri doanh, hoa doanh
chat luc » chat xuc, chat lua, nhan luc
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
luc voi » luc moi, luc doi, luc khoi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
ly vang » ly hang, ly van, ly quang
y nang » ky nang, ly nang, v nang

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 ((y nang) or (ly vang)) xa hoi. ((hieu ve) OR (hieu va)) chat luc voi doanh huong cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ly vang)) xa hoi. ((hieu ve) OR (hieu va)) chat luc voi doanh huong cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (ly vang)) xa hoi. ((hieu ve) OR (hieu va)) chat luc voi doanh huong cua tre*".