Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
va cau » van cau, va cac, va dau
ve cam » ve cham, ve cac, ve cai

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: ((tu sach) OR (thu sach)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) xuc van hanh va cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) xuc van hanh va cau tren~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) xuc van hanh va cau tren*.