Perhaps you should try some spelling variations:
chieu lang » chieu sang, hieu lang, chi lang
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
thong cong » trong cong, tong cong, thong thong
hanh tinh » hanh trinh, thanh tinh, canh tinh
ho chieu » theo chieu, hoc thieu, doi chieu
va thong » va thuong, va phuong, he thong
cong van » cong vang, cong san, song van
tuan ban » tuan bang, toan ban, quang ban
luan ban » luan van, luan san, luan han

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

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