Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
thanh hai » thanh phan, thanh hoa, thanh san
cua viet » ca viet, hoa viet, cua vat
duc tran » duc tan, duc toan, duc tren
sach tu » sach thu, sach ty, sach uu
hai cua » thai cua, dai cua, hoi cua
vu cham » va cham, vu kham, tu cham
cach tu » cach thuc
ve cham » va cham, ve chat, ve chim
nong x » nong xa, nang x, nong e
x hoi » xa hoi, o hoi, x ho

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 tu) or (cach tu)) nong x hoi. hieu ((ve cham) or (vu cham)) duc tran thanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (cach tu)) nong x hoi. hieu ((ve cham) OR (vu cham)) duc tran thanh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (cach tu)) nong x hoi. hieu ((ve cham) or (vu cham)) duc tran thanh hai cua viet*.