Perhaps you should try some spelling variations:
nhung tung » nhung tuong, nhung dung, nhung vung
hieu sang » chieu sang, hieu lang, hieu quang
tranh cua » doanh cua
doc hieu » toc thieu, hoc thieu, hoc hien
manh cua » doanh cua, ban cua
tung ban » tuong ban, tung dan, tang ban
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - canh ((tranh cua) OR (manh cua)) nhung tung ban ((than cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sang - canh ((tranh cua) or (manh cua)) nhung tung ban ((than cau) OR (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - canh ((tranh cua) or (manh cua)) nhung tung ban ((than cau) OR (toan cau))*.