Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van bac » van ban, van bao, van hac
mang xa » mang may, dang xay, mang cua
lang xa » lang ha, dang xay, lang van
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
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: su sach thieu ((lang xa) or (mang xa)) hoi. hieu van bac ((xuc va) or (tuc va)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thieu ((lang xa) OR (mang xa)) hoi. hieu van bac ((xuc va) OR (tuc va)) thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: su sach thieu ((lang xa) or (mang xa)) hoi. hieu van bac ((xuc va) or (tuc va)) thanh vi cua te*.