Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thanh dao » thanh dat, thanh dam, thanh do
sach thi » sach thu, sach tai, sach thieu
thi hang » thi hanh, thi nang, thi hong
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
thuc dan » thuc hanh, hoc dan, thuc vat
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va
dao su » dao suu, dan su, cao su

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thi hang xa hoi. ((hieu ve) or (hieu van)) cam thuc dan thanh dao su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thi hang xa hoi. ((hieu ve) OR (hieu van)) cam thuc dan thanh dao su triet.
• Adding a wildcard symbol may retrieve word variants: so sach thi hang xa hoi. ((hieu ve) or (hieu van)) cam thuc dan thanh dao su triet*.