Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
dang van » hoang van, hang va
te sach » toc sach
cau luc » cau truc, cau phuc
nang xa » nang x, lang xa, nang ma
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cac luc » coc luc, cac nuoc, cac cuoc
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) or (dang van)) hoi. hieu ve ((cac luc) OR (cau luc)) va hanh hai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (dang van)) hoi. hieu ve ((cac luc) OR (cau luc)) va hanh hai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (dang van)) hoi. hieu ve ((cac luc) OR (cau luc)) va hanh hai cua su".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (dang van)) hoi. hieu ve ((cac luc) OR (cau luc)) va hanh hai cua su*.