Perhaps you should try some spelling variations:
sach hay » sach han, sach ha, sach nay
sach ty » sach y, sach tu, sach thu
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va, hieu van
loc va » hoc va
vi cua » vai cua, di cua
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va
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: thuat ((sach hay) or (sach ty)) hang xa hoi. hieu ve cau ((luc va) OR (loc va)) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach hay) OR (sach ty)) hang xa hoi. hieu ve cau ((luc va) OR (loc va)) hanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach hay) or (sach ty)) hang xa hoi. hieu ve cau ((luc va) OR (loc va)) hanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach hay) or (sach ty)) hang xa hoi. hieu ve cau ((luc va) OR (loc va)) hanh vi cua tu*.