Perhaps you should try some spelling variations:
qua pham » quan pham, quy pham, qua cham
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
va chua » vua chua, va chu, a chua
ca chua » ca cua, sua chua
y nang » ky nang, v nang, may nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (ly nang)) xa hoi. hieu qua pham duc va thanh ((va chua) OR (ca chua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) xa hoi. hieu qua pham duc va thanh ((va chua) OR (ca chua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (ly nang)) xa hoi. hieu qua pham duc va thanh ((va chua) OR (ca chua)) te".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ly nang)) xa hoi. hieu qua pham duc va thanh ((va chua) OR (ca chua)) te*.