Perhaps you should try some spelling variations:
phan phap » pham phap, phan phat, han phap
cong thuc » cong tac
van thinh » van thanh, van chinh, van minh
ho chieu » theo chieu, hoc thieu, mot chieu
phap lua » phap luat, phap luan, phap luu
lua cong » luat cong, luan cong, cua cong
thuc van » thuc vat, thuc dan, thuc va
thinh ca » tinh ca, chinh ca, thanh ca

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) or (toc thieu)) tinh - phan phap lua cong thuc van thinh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (toc thieu)) tinh - phan phap lua cong thuc van thinh ca.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (toc thieu)) tinh - phan phap lua cong thuc van thinh ca*.