Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach tham
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va, hieu van
dao suu » dao huu, da suu
dao su » dan su, cao su, da su
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach thi) OR (sach thieu)) hang xa hoi. hieu ve am thuc dan hanh ((dao su) or (dao suu)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thi) OR (sach thieu)) hang xa hoi. hieu ve am thuc dan hanh ((dao su) OR (dao suu)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thi) OR (sach thieu)) hang xa hoi. hieu ve am thuc dan hanh ((dao su) or (dao suu)) triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach thi) OR (sach thieu)) hang xa hoi. hieu ve am thuc dan hanh ((dao su) or (dao suu)) triet*.