Perhaps you should try some spelling variations:
xuc ngan » luc ngan, luc nganh, vu ngan
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
hieu ve » hieu va, hieu van
co hoi » co hoc, co loi
ve cam » ve cham, ve cac, va cam
va cau » van cau, va cac, va dau
o hoi » o hoc, o hai, o hoa
hang » dang, bang, hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tu nang ((o hoi) or (co hoi)). hieu ve cam xuc ngan hang va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nang ((o hoi) OR (co hoi)). hieu ve cam xuc ngan hang va cau tren*.