Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh vai » hanh vi, hanh tai, hanh van
cham xuc » cam xuc, chat xuc, cham soc
hanh va » hang va, hanh vi
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
lai roi » loi roi
lai hoi » dai hoi, lai hoa, mai hoi
ky lang » ky nang, ky dang, ky tang
ve cham » va cham, ve chat, vu cham
xuc va » duc va, tuc va, luc va

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