Perhaps you should try some spelling variations:
thieu lang » hieu lang, thieu khang, thieu quang
nam thuoc » nam thuc, nam thu, nha thuoc
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thuoc va » thuc va, thuoc ma, thuong va
danh sai » dung sai, danh bat, danh dau
lang xa » lang ha, dang xay, lang van
dan sai » doan sai, dan tai, dan giai
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: thu sach thieu lang xa hoi. hieu van nam thuoc va ((dan sai) or (danh sai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thieu lang xa hoi. hieu van nam thuoc va ((dan sai) OR (danh sai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach thieu lang xa hoi. hieu van nam thuoc va ((dan sai) or (danh sai)) cua tre*.