Perhaps you should try some spelling variations:
vuong thuat » thuong thuat, trong thuat, vuong tat
chieu sang » chieu sach, chieu xanh, hieu lang
hung thuat » thuong thuat, hung phat, hung thu
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
cong manh » cong danh, duong manh, cong thanh
toan cau » toan cao, toan tap, toan tai
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 - manh ((hung thuat) OR (vuong thuat)) nhung cong manh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - manh ((hung thuat) OR (vuong thuat)) nhung cong manh ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - manh ((hung thuat) OR (vuong thuat)) nhung cong manh ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - manh ((hung thuat) OR (vuong thuat)) nhung cong manh ((toan cau) or (toan ban))*.