Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
doi lieu » duoc lieu, doi chieu, du lieu
dong dan » dong danh, duong dan, dong san
toan cao » toan tap
toan ban » van ban
sinh va » sinh vat, tinh va, dinh van
va cong » tai cong, cua cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi lieu tinh - hanh sinh va cong dong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi lieu tinh - hanh sinh va cong dong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi lieu tinh - hanh sinh va cong dong dan ((toan cao) or (toan ban))*.