Perhaps you should try some spelling variations:
thu canh » thuc hanh, thu cong, thu ban
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
ty canh » ty anh, thuy canh, thi canh
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
va cam » va cham, va cac, va cao
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty canh) OR (thu canh)) xa hoi. lieu va cam luc van hanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty canh) OR (thu canh)) xa hoi. lieu va cam luc van hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty canh) OR (thu canh)) xa hoi. lieu va cam luc van hanh vi cau tren*.