Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, chau tinh, kieu tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
dung cong » dung trong
khang cu » khung cua, thang cua, chung cu
khan cua » nhan cua, than cua, han cua
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: theo ((chieu tinh) OR (lieu tinh)) - hanh ((khang cu) or (khan cua)) dung cong tac thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (lieu tinh)) - hanh ((khang cu) OR (khan cua)) dung cong tac thai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) OR (lieu tinh)) - hanh ((khang cu) or (khan cua)) dung cong tac thai cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) OR (lieu tinh)) - hanh ((khang cu) or (khan cua)) dung cong tac thai cao*.