Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
van chat » cao chat
hang hai » hoang hai, hang tai, thanh hai
hanh hai » thanh hai, nhanh hai, hanh tai
ve chat » va chat
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
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 ((ve chat) or (van chat)) xuc va ((hanh hai) OR (hang hai)) cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hoi. hieu ((ve chat) OR (van chat)) xuc va ((hanh hai) OR (hang hai)) cau theo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang o hoi. hieu ((ve chat) or (van chat)) xuc va ((hanh hai) OR (hang hai)) cau theo*".