Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
nang dai » nang dau, nang tai, lang dai
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
dai hai » dai han, dai hoi, dai tai
hieu ve » hieu va, hieu van
cua tre » cuu tre, cua triet, dua tren
cam luc » cau luc
sach ky » sac ky, sach y, sach ty
cua te » cua tu

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 dai hai. hieu ve ((cam luc) OR (cam xuc)) van hanh hai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang dai hai. hieu ve ((cam luc) OR (cam xuc)) van hanh hai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang dai hai. hieu ve ((cam luc) OR (cam xuc)) van hanh hai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang dai hai. hieu ve ((cam luc) OR (cam xuc)) van hanh hai ((cua tre) or (cua te))*.