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

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) OR (can thuc)) day ((xanh di) 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) OR (can thuc)) day ((xanh di) 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) OR (can thuc)) day ((xanh di) or (hanh ve)) cua triet".
• Adding a wildcard symbol may retrieve word variants: hoc sach thu nang xa hoi. hieu qua ((ca thuc) OR (can thuc)) day ((xanh di) or (hanh ve)) cua triet*.