Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
than cua » nhan cua, thai cua, ban cua
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
xuc van » duc van, luc van, vuc van
van bac » van ban, van bao, van hac
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ang xa » lang xa, mang xa, hoang xa

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 ty ((((ang xa) OR (dang xay))) or (mang may)) hoi. hieu van bac xuc van hanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((((ang xa) OR (dang xay))) OR (mang may)) hoi. hieu van bac xuc van hanh than cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((((ang xa) OR (dang xay))) or (mang may)) hoi. hieu van bac xuc van hanh than cua tre*".