Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
trung vap » trung cap, trung va, trung van
vap nhung » va nhung, ve nhung, voi nhung
cong dan » cong san, cong tan, cong dong
toan ban » van ban

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

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