Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
cau treo » cau theo, cau tren, cau triet
hanh hai » thanh hai, hang hai, hanh tai
hieu ve » hieu va, hieu van
su sac » su sach, su cac, su xac
luc va » tuc va, loc va
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
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 sac ky nang o hoi. hieu ve cac ((duc va) or (luc va)) ((hanh hai) OR (nhanh hai)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang o hoi. hieu ve cac ((duc va) OR (luc va)) ((hanh hai) OR (nhanh hai)) cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang o hoi. hieu ve cac ((duc va) or (luc va)) ((hanh hai) OR (nhanh hai)) cau treo".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang o hoi. hieu ve cac ((duc va) or (luc va)) ((hanh hai) OR (nhanh hai)) cau treo*.