Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh hai » thanh phan, thanh hoa, thanh san
tan thanh » tran thanh, tang thanh, toan thanh
sach ty » sach y, sach tu, sach thu
hai cua » thai cua, dai cua, hoi cua
ve chat » va chat, van chat
tu sach » thu sach, su sach, te sach
ve cham » va cham, vu cham, ve chim
nong x » nong xa, nong e, nong o

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nong x) or (nang x)) hoi. hieu ((ve cham) OR (ve chat)) duc tan thanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nong x) OR (nang x)) hoi. hieu ((ve cham) OR (ve chat)) duc tan thanh hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nong x) or (nang x)) hoi. hieu ((ve cham) OR (ve chat)) duc tan thanh hai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nong x) or (nang x)) hoi. hieu ((ve cham) OR (ve chat)) duc tan thanh hai cua triet*.