Perhaps you should try some spelling variations:
hoc duoc » hoc nuoc, hoa duoc, hoc dung
te sach » toc sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
duoc va » nuoc va, duc va, duoc ma
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
ve hoc » te hoc, va hoc, vi hoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (lang xa)) hoi. hieu ve hoc duoc va hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) OR (lang xa)) hoi. hieu ve hoc duoc va hanh vi ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) OR (lang xa)) hoi. hieu ve hoc duoc va hanh vi ((cua tre) or (cuu tre))*.