Perhaps you should try some spelling variations:
sach tham » sach nha
tham hanh » pham hanh, tham canh, tham manh
cua triet » cua viet, su triet, va triet
doc sach » hoc sach, toc sach, nuoc sach
hanh cau » nhanh cau, hang cau, hanh cac
hanh van » thanh van, khanh van, hanh va
hieu va » lieu va, hieu qua
cac tuc » cac tu, cac tac, cac nuoc
cac toc » cac toi, cac nuoc, cac thoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach tham hanh cau hoi. hieu va ((cac tuc) or (cac toc)) xa ((hanh van) or (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach tham hanh cau hoi. hieu va ((cac tuc) OR (cac toc)) xa ((hanh van) OR (hanh vi)) cua triet.
• Adding a wildcard symbol may retrieve word variants: doc sach tham hanh cau hoi. hieu va ((cac tuc) or (cac toc)) xa ((hanh van) or (hanh vi)) cua triet*.