Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh chau » thanh cha, thanh cham, thanh chu
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
tong cong » trong cong, cong cong, dung cong
cong tan » cong tac, cong san, cong thanh
hanh cac » hang cac, hanh cat, nhanh cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - thanh ((trung cua) OR (trung cap)) tong cong tan ((thanh chau) or (hanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((trung cua) OR (trung cap)) tong cong tan ((thanh chau) OR (hanh cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh ((trung cua) OR (trung cap)) tong cong tan ((thanh chau) or (hanh cac))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((trung cua) OR (trung cap)) tong cong tan ((thanh chau) or (hanh cac))*.