Perhaps you should try some spelling variations:
danh thanh » dinh thanh, dang thanh, nhanh thanh
thanh lai » thanh hai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
duc danh » duc anh, duc manh, duc hanh
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
nam duc » nam duoc, pham duc, nam thuc
cua tre » cuu tre, cua triet, dua tren
y lang » o lang, _ lang, tay lang
cua te » cua tu

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 lang xa hoi. hieu van nam duc danh thanh lai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu van nam duc danh thanh lai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu van nam duc danh thanh lai ((cua tre) or (cua te))*.