Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
dau tren » dau tien, dat tren, dau tieng
hanh hai » nhanh hai, hang hai, hanh tai
cau tren » cu tren, ca tren, cau treo
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
xuc va » duc va, tuc va, luc va
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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