Perhaps you should try some spelling variations:
thanh lai » thanh lap, thanh loi, thanh tai
thanh hai » thanh phan, thanh hoa, thanh san
hang cao » hoang cao, nang cao, hang cau
su sach » so sach, vu sach
cam luc » cam xuc, cau luc
cho tre » cho thue, khoe tre
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
hang ca » hang va, nang cao, hang tai
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((hang cao) OR (hang ca)) loi. hieu va cam luc va ((thanh lai) or (thanh hai)) cho tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((hang cao) OR (hang ca)) loi. hieu va cam luc va ((thanh lai) OR (thanh hai)) cho tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((hang cao) OR (hang ca)) loi. hieu va cam luc va ((thanh lai) or (thanh hai)) cho tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((hang cao) OR (hang ca)) loi. hieu va cam luc va ((thanh lai) or (thanh hai)) cho tre*.