Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
van hoi » van hoc, van hoe, van loi
qua cau » quan cau, qua cac, qua ca
y lang » o lang, _ lang, tay lang
luc va » duc va, tuc va
loc va » hoc va
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 y lang ((van hoi) or (van hoa)). hieu qua cau ((luc va) OR (loc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang ((van hoi) OR (van hoa)). hieu qua cau ((luc va) OR (loc va)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang ((van hoi) or (van hoa)). hieu qua cau ((luc va) OR (loc va)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang ((van hoi) or (van hoa)). hieu qua cau ((luc va) OR (loc va)) hanh vi cua te*.