Perhaps you should try some spelling variations:
phan dung » phan ung, phan dang, chan dung
cong thuc » cong tac
ho chieu » theo chieu, hoc thieu, mot chieu
dung dat » dung va, dung tai
dat cong » dai cong, dam cong, bat cong
thuc dan » thuc hanh, hoc dan, thuc vat
dan van » dang van, doan van, dao van
van lap » van lam, dan lap, van dap

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)) sach - phan dung dat cong thuc dan van lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (toc thieu)) sach - phan dung dat cong thuc dan van lap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (toc thieu)) sach - phan dung dat cong thuc dan van lap*.