Perhaps you should try some spelling variations:
hoang van » hang va
lang van » dang van, tang van, giang van
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
bo sach » co sach, hoc sach
nam xuc » cam xuc, nam xua, nam thuc
xuc van » duc van, luc van, vuc van
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

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