Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
xanh tai » hanh tai, anh tai, vanh tai
sach thu » sach thue, sach thieu, sach tham
hoc sach » hoc sinh, hoc cac, hoc anh
thu nang » thi nang, thu hang, thu bang
ca thuc » can thuc, cay thuc, va thuc
nang xa » nang x, lang xa, nang ma
hanh ve » hanh vi, hanh va, hanh kem
xanh di » danh di, vanh dai
qua ca » qua cac, qua cua, qua cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach thu nang xa hoi. hieu qua ca thuc day ((((xanh di) OR (xanh tai))) or (hanh ve)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach thu nang xa hoi. hieu qua ca thuc day ((((xanh di) OR (xanh tai))) OR (hanh ve)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach thu nang xa hoi. hieu qua ca thuc day ((((xanh di) OR (xanh tai))) or (hanh ve)) cua triet".
• Adding a wildcard symbol may retrieve word variants: hoc sach thu nang xa hoi. hieu qua ca thuc day ((((xanh di) OR (xanh tai))) or (hanh ve)) cua triet*.