Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
luc van » luoc van, duc van, luc va
luu van » cuu van, luan van, luu hanh
va cau » van cau, va cac, va dau
vi cua » vai cua, di cua
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: tu sach _ lang xa hoi. hieu va cau ((luc van) OR (luu van)) hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach _ lang xa hoi. hieu va cau ((luc van) OR (luu van)) hanh vi cua te*".