Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
dung dat » dung va, dung tai
danh sai » dung sai, danh bat, danh dau
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
lang ha » long ha
lang xa » dang xay, lang van
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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 thu ((lang xa) or (lang ha)) hoi. hieu van cam tuc va ((danh sai) or (dung dat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((lang xa) OR (lang ha)) hoi. hieu van cam tuc va ((danh sai) OR (dung dat)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((lang xa) or (lang ha)) hoi. hieu van cam tuc va ((danh sai) or (dung dat)) cua tre*.