Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham xuc » cam xuc, chat xuc, pham duc
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
do tren » dong tren, duoc tren, do trung
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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

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