Perhaps you should try some spelling variations:
loai tren » la tren, thai tren
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
dinh xa » dinh ba, dinh va, dinh xu
sach ky » sach y, sach ty, sach kem
vu cham » va cham, vu kham, tu cham
xuc van » duc van, luc van, vuc van
hieu vu » hieu va, hieu ve, hieu su
sac ky » cac ky, sai ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) dinh xa hoi. hieu vu cham xuc van hanh vi ((cau tren) OR (loai tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sac ky)) dinh xa hoi. hieu vu cham xuc van hanh vi ((cau tren) or (loai tren))~".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sac ky)) dinh xa hoi. hieu vu cham xuc van hanh vi ((cau tren) or (loai tren))*.