Perhaps you should try some spelling variations:
chieu sang » chieu xanh, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
manh trung » manh tung, thanh trung, manh hung
hieu lang » hieu quang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
cua dang » cua cong, cua ban
cong tac » cong ty
tac thai » toc thai, rac thai, sac thai
thai cao » tai cao, thoai cac, thuat cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((((chieu sang) OR (hieu lang))) or (chieu sach)) - manh trung cua dang cong tac thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((((chieu sang) OR (hieu lang))) OR (chieu sach)) - manh trung cua dang cong tac thai cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((((chieu sang) OR (hieu lang))) or (chieu sach)) - manh trung cua dang cong tac thai cao*".