Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh vai » hanh vi, hanh tai, hanh van
cham doc » cham soc, chat doc, chau doc
mai khoi » mai khoa, tai khoa, cac khoi
sang mai » sang ma, sang tai, lang mai
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
hanh va » hang va, hanh vi
tu sach » thu sach, su sach, te sach
doc va » duoc va, hoc va, duc 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 sang mai khoi. hieu va cham doc va ((hanh vai) or (hanh va)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty sang mai khoi. hieu va cham doc va ((hanh vai) OR (hanh va)) cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ty sang mai khoi. hieu va cham doc va ((hanh vai) or (hanh va)) cau tren*.