Perhaps you should try some spelling variations:
phap luu » phap lua, phap luat, phap luan
van doan » van doanh, van toan, van hoan
doan van » doan va, hoang van, luan van
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
hieu va » lieu va, hieu qua
luu van » cuu van, luan van, luu hanh
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
y nang » ly 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: tu sach ((y nang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) phap luu van doan van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) phap luu van doan van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) phap luu van doan van cua tre*".