Perhaps you should try some spelling variations:
hoang van » hang va
ban hanh » ban hang
lang van » dang van, tang van, giang van
cham xuc » cam xuc, chat xuc, cham soc
hoc sac » hoc sach, hoc cac, hoc mac
xuc ban » duc ban, cuc ban, quoc ban
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky ((lang van) OR (hoang van)) hoi. hieu va cham xuc ban hanh vi ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky ((lang van) OR (hoang van)) hoi. hieu va cham xuc ban hanh vi ((cua te) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sac ky ((lang van) OR (hoang van)) hoi. hieu va cham xuc ban hanh vi ((cua te) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: hoc sac ky ((lang van) OR (hoang van)) hoi. hieu va cham xuc ban hanh vi ((cua te) or (cuu tre))*.