Perhaps you should try some spelling variations:
dieu quang » diep quang, dien quang, dieu quan
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
cua nhung » va nhung
hoc dieu » hoc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
gian man » gian dan, gian lan, gian van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu quang - nhanh tinh cua nhung ((cong dan) or (cong tan)) gian man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu quang - nhanh tinh cua nhung ((cong dan) OR (cong tan)) gian man.
• Adding a wildcard symbol may retrieve word variants: hoc dieu quang - nhanh tinh cua nhung ((cong dan) or (cong tan)) gian man*.