Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
thanh chau » thanh cha, thanh cham, thanh chu
hoc chieu » hoc thieu, ho chieu, hoc hien
dong tac » cong tac, dong tai, dong bac
thuy » thu, thuc

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 - hanh trung thanh cong dong tac ((thanh chau) or (thanh thuy))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh trung thanh cong dong tac ((thanh chau) OR (thanh thuy)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh trung thanh cong dong tac ((thanh chau) or (thanh thuy))*.