Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
dang xay » dang van, van xay
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
cham xuc » chat xuc, cham soc, pham duc
tu sach » thu sach, su sach, te sach
la tren » loai tren, dua tren, dat tren
xay hoi » xa hoi, tay hoi, cay phoi
sach o » sach lo, sac o, sach y
o dang » xo dang, do dang, so dang

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 o dang xay hoi. hieu van ((cham xuc) or (cam xuc)) van hanh vi ((cau tren) or (la tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach o dang xay hoi. hieu van ((cham xuc) OR (cam xuc)) van hanh vi ((cau tren) OR (la tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach o dang xay hoi. hieu van ((cham xuc) or (cam xuc)) van hanh vi ((cau tren) or (la tren))*.