Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
hieu ve » hieu van
cau luc » cau truc, cau phuc
va cua » va chua, via cua, ca cua
luc va » duc va, tuc va, loc va
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: thu sach y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu va)) cau luc va hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (hieu va)) cau luc va hanh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu va)) cau luc va hanh va cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu va)) cau luc va hanh va cua te*.