Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
cham hoc » cham soc, chat hoc, cham hoi
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((lang xa) OR (lang van)) hoi. hieu vu cham hoc va hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((lang xa) OR (lang van)) hoi. hieu vu cham hoc va hanh vi cuu tre*.