Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
tuc van » thuc van, truc van, tuc va
va chat » van chat, va phat, hoa chat
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) or (dang xay)) hoi. lieu ((va chat) OR (cao chat)) tuc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (dang xay)) hoi. lieu ((va chat) OR (cao chat)) tuc van hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (dang xay)) hoi. lieu ((va chat) OR (cao chat)) tuc van hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (dang xay)) hoi. lieu ((va chat) OR (cao chat)) tuc van hanh di cua tre*.