Perhaps you should try some spelling variations:
thong danh » thong lanh, trong danh, thong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
thong dan » thong van, tuong dan, thong den
trung va » truong va, trang va, trung ha
tran van » luan van
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((trung va) or (tran van)) thong ((thong danh) OR (thong dan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trung va) OR (tran van)) thong ((thong danh) OR (thong dan)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((trung va) or (tran van)) thong ((thong danh) OR (thong dan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trung va) or (tran van)) thong ((thong danh) OR (thong dan)) toan ban*.