Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhiet nang » nhiet dong, viet nang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh luat, trinh quan
sinh cua » manh cua, dinh cuu, sinh va
cong van » cong vang, cong san, song van
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu tinh) or (nhiet nang)) - hanh ((trinh cua) or (sinh cua)) nhung cong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (nhiet nang)) - hanh ((trinh cua) OR (sinh cua)) nhung cong van van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (nhiet nang)) - hanh ((trinh cua) or (sinh cua)) nhung cong van van ban*.