Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
tung thanh » trung thanh, tang thanh, dung thanh
thanh dung » thanh duong, thanh hung, hanh dung
trong tinh » truong tinh, trong kinh, trong sinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
toan cau » toan cao, toan ban, toan tap

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 manh) or (chinh sach))) or (chieu sang)) - thanh tung thanh dung trong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (chinh sach))) OR (chieu sang)) - thanh tung thanh dung trong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) or (chinh sach))) or (chieu sang)) - thanh tung thanh dung trong tinh toan cau*.