Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh vii » hanh voi, hanh va, hanh noi
cham xuc » cam xuc, chat xuc, cham soc
lang mai » lang dai, lang hai, lang man
mai khoi » mai khoa, tai khoa, cac khoi
ve cham » va cham, ve chat, vu cham
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
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) OR (sac ky)) lang mai khoi. hieu ve cham xuc va ((hanh vii) or (hanh vi)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) lang mai khoi. hieu ve cham xuc va ((hanh vii) OR (hanh vi)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) lang mai khoi. hieu ve cham xuc va ((hanh vii) or (hanh vi)) cau tren".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) lang mai khoi. hieu ve cham xuc va ((hanh vii) or (hanh vi)) cau tren*.