Perhaps you should try some spelling variations:
xang van » dang van, tang van, nang van
lang van » dang van, tang van, hoang van
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((xang van) OR (lang van)) hoe. hieu ve cau luc va hanh vi cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((xang van) OR (lang van)) hoe. hieu ve cau luc va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((xang van) OR (lang van)) hoe. hieu ve cau luc va hanh vi cua viet*.