Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
xuc van » duc van, luc van, xuc ban
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
co tren » cu tren, do tren, ca 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) OR (hieu van)) cham xuc van hanh vi ((cau tren) or (co tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky lang xa hoi. ((hieu ve) OR (hieu van)) cham xuc van hanh vi ((cau tren) OR (co tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky lang xa hoi. ((hieu ve) OR (hieu van)) cham xuc van hanh vi ((cau tren) or (co tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang xa hoi. ((hieu ve) OR (hieu van)) cham xuc van hanh vi ((cau tren) or (co tren))*.