Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu tinh » trieu tinh, lieu tinh, chau tinh
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan
toan ban » van ban
tinh ca » tinh cao, tinh cua, tinh va
sinh va » sinh vat, tinh va, dinh van

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

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