Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, cau treo
van hanh » van thanh, ban hanh, van anh
van chat » cao chat
ve chat » va chat
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, xuc ban
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ca tren » cu tren, la tren, co tren

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