Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
luu van » cuu van, luan van, luu hanh
xuc ban » duc ban, cuc ban, quoc ban
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
tu lang » cu lang, tu lanh, xu lang
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 tu lang xa hoi. ((hieu ve) or (lieu va)) cham ((xuc ban) or (luu van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu lang xa hoi. ((hieu ve) OR (lieu va)) cham ((xuc ban) OR (luu van)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach tu lang xa hoi. ((hieu ve) or (lieu va)) cham ((xuc ban) or (luu van)) hanh vi cua tre*.