Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
van cham » van tham, va cham, van pham
hanh vai » hanh vi, hanh va, hanh tai
van chat » cao chat
sach ky » sac ky, sach y, sach ty
vai cau » va cau, van cau, vai cac
tu sach » thu sach, su sach, te sach
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu ((van cham) or (van chat)) ((xuc va) OR (luc va)) hanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((van cham) OR (van chat)) ((xuc va) OR (luc va)) hanh vai cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ((van cham) or (van chat)) ((xuc va) OR (luc va)) hanh vai cau tren*".