Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
cau tren » cu tren, dau tren, cau treo
hoc anh » hoc nganh, hoc nhanh, ngoc anh
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
dinh vi » dinh viet, dinh tri, dinh thi
dinh ve » dinh ket, dinh van
ca tren » cu tren, la tren, co tren
anh ky » hanh ky, anh y, anh my
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc anh ky nang cau hoi. hieu ve cau luc va ((dinh vi) OR (dinh ve)) ((cau tren) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc anh ky nang cau hoi. hieu ve cau luc va ((dinh vi) OR (dinh ve)) ((cau tren) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc anh ky nang cau hoi. hieu ve cau luc va ((dinh vi) OR (dinh ve)) ((cau tren) or (ca tren))".
• Adding a wildcard symbol may retrieve word variants: hoc anh ky nang cau hoi. hieu ve cau luc va ((dinh vi) OR (dinh ve)) ((cau tren) or (ca tren))*.