Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
dang mau » dong mau, dang van, dang su
dang dan » dang dang, dang van, dung dan
cam duc » cam xuc, cao duc, pham duc
hanh va » hang va, hanh vi
van cam » van nam, van lam, van cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((dang dan) or (dang mau)) hoi. hieu van cam duc va ((hanh vai) or (hanh va)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((dang dan) OR (dang mau)) hoi. hieu van cam duc va ((hanh vai) OR (hanh va)) cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((dang dan) or (dang mau)) hoi. hieu van cam duc va ((hanh vai) or (hanh va)) cau tren*.