Perhaps you should try some spelling variations:
trong van » trong cac
thanh lap » thanh san, phan lap, thanh hai
tang van » dang van, hoang van, tang luan
thuc va » thuc vat, thuc dan, thuc day
lap cua » lai cua, tap cua, lam cua
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
tuc va » truc va, tuc xa, duc va

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 ((tang van) OR (trong van)) hoi. hieu ve cham ((tuc va) or (thuc va)) thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((tang van) OR (trong van)) hoi. hieu ve cham ((tuc va) OR (thuc va)) thanh lap cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((tang van) OR (trong van)) hoi. hieu ve cham ((tuc va) or (thuc va)) thanh lap cua tre*".