Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tranh cua, tang cua, thang cua
trung cua » truong cua, trung tuan, trung cap
hoc hieu » hoc thieu, hoc hien, doc hieu
cong anh » cong danh, dong anh, cong thanh
hong anh » hoang anh, hong hanh, dong anh
tuan ban » tuan bang, toan ban, luan 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 hieu lang - hanh ((trang cua) OR (trung cua)) nhung ((cong anh) or (hong anh)) tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh ((trang cua) OR (trung cua)) nhung ((cong anh) OR (hong anh)) tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - hanh ((trang cua) OR (trung cua)) nhung ((cong anh) or (hong anh)) tuan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh ((trang cua) OR (trung cua)) nhung ((cong anh) or (hong anh)) tuan ban*.