Perhaps you should try some spelling variations:
danh thanh » dinh thanh, dang thanh, nhanh thanh
thien van » thi van
thanh lap » thanh san, phan lap, thanh hai
hieu van » hieu va, lieu va, hieu ve
duc danh » duc anh, duc manh, duc hanh
lap cua » lai cua, tap cua, lam cua
nam duc » nam duoc, pham duc, nam thuc
tu sach » thu sach, su sach, tu cach
lang xa » lang ha, dang xay, lang van
tu lang » cu lang, tu lanh, xu lang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet

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) OR (te sach)) tu lang xa hoi. ((hieu van) or (thien van)) nam duc danh thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) tu lang xa hoi. ((hieu van) OR (thien van)) nam duc danh thanh lap cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) tu lang xa hoi. ((hieu van) or (thien van)) nam duc danh thanh lap cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) tu lang xa hoi. ((hieu van) or (thien van)) nam duc danh thanh lap cua tre*.