Perhaps you should try some spelling variations:
nhanh thanh » phan thanh, nhanh tinh
thanh cau » thanh chau, thanh mau, nhanh cau
van nhanh » van thanh, van hanh, van khanh
cau tren » cu tren, dau tren, ca tren
sach thu » sach thue, sach thieu, sach tham
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, xach tay
ve cac » va cac, vien cac
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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) or (sach thu)) nang ((o hoi) or (o hai)). hieu ve cac xuc van nhanh thanh cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang ((o hoi) OR (o hai)). hieu ve cac xuc van nhanh thanh cau tren.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang ((o hoi) or (o hai)). hieu ve cac xuc van nhanh thanh cau tren*.