Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ve cua » le cua, de cua, te cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach _ ((lang xa) OR (dang xay)) hoi. hieu van cam ((xuc va) or (tuc va)) thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach _ ((lang xa) OR (dang xay)) hoi. hieu van cam ((xuc va) OR (tuc va)) thanh ve cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach _ ((lang xa) OR (dang xay)) hoi. hieu van cam ((xuc va) or (tuc va)) thanh ve cua tre*".