Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
tinh dai » trinh dai, tinh da, tinh hai
va tinh » may tinh
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
xay hoi » xa hoi, tay hoi, cay phoi
ky danh » ky anh
ky dang » ky nang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ((ky dang) or (ky danh)) xay hoi. ((hieu viec) OR (hieu ve)) cam xuc va tinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky danh)) xay hoi. ((hieu viec) OR (hieu ve)) cam xuc va tinh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) or (ky danh)) xay hoi. ((hieu viec) OR (hieu ve)) cam xuc va tinh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) or (ky danh)) xay hoi. ((hieu viec) OR (hieu ve)) cam xuc va tinh dai cua tre*.