Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dang van » hoang van, hang va
van cam » van nam, van lam, van cau
sach ky » sac ky, sach y, sach ty
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, 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
vi cua » vai cua, di cua

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

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