Perhaps you should try some spelling variations:
duong sinh » duong manh, trong sinh, dang sinh
duong minh » duong manh, truong minh, thong minh
hieu lang » chieu sang, hieu quang, nhieu tang
nho hieu » nha hieu, nho sieu, nhu hieu
mang cua » manh cua, ban cua, cong cua
dung cua » dung luan, dung cho
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: nho hieu lang - hanh ((mang cua) or (dung cua)) dong ((duong sinh) OR (duong minh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu lang - hanh ((mang cua) OR (dung cua)) dong ((duong sinh) OR (duong minh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho hieu lang - hanh ((mang cua) or (dung cua)) dong ((duong sinh) OR (duong minh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - hanh ((mang cua) or (dung cua)) dong ((duong sinh) OR (duong minh)) toan ban*.