Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cau treo » cau theo, cau tren, cau triet
hanh hai » nhanh hai, hang hai, hanh tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc va » duc va, tuc va, luc va
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa

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 ky nang ((o hoi) OR (co hoi)). hieu qua cac xuc va ((hanh hai) or (thanh hai)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((o hoi) OR (co hoi)). hieu qua cac xuc va ((hanh hai) OR (thanh hai)) cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((o hoi) OR (co hoi)). hieu qua cac xuc va ((hanh hai) or (thanh hai)) cau treo".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((o hoi) OR (co hoi)). hieu qua cac xuc va ((hanh hai) or (thanh hai)) cau treo*.