Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
mai khoi » tai khoa, cac khoi, dai khoa
hanh vai » hanh vi, hanh tai, hanh van
mai khoa » tai khoa, may khoa, dai khoa
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty lang » tay lang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
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 ty lang ((mai khoi) OR (mai khoa)). hieu ve cham xuc va ((hanh vai) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty lang ((mai khoi) OR (mai khoa)). hieu ve cham xuc va ((hanh vai) OR (hanh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty lang ((mai khoi) OR (mai khoa)). hieu ve cham xuc va ((hanh vai) or (hanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang ((mai khoi) OR (mai khoa)). hieu ve cham xuc va ((hanh vai) or (hanh va)) cuu tre*.