Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh va » thanh van, hanh va, thanh ha
tay dong » tac dong, day dong, tai dong
cham luc » cham soc, nhan luc, cham cuu
thi cham » thi hai, toc cham, thi ha
hieu thi » sieu thi, hieu chi, hiep thi
so sach » so sanh, bo sach, co sach
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
hoa hoi » khoa hoi, hoa doi, hoc hoi
ty dong » tu dong, ly dong, ty nong
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ty dong) or (tay dong)) ((hoa hoi) OR (hoa hoc)). hieu thi cham luc van thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty dong) OR (tay dong)) ((hoa hoi) OR (hoa hoc)). hieu thi cham luc van thanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ty dong) or (tay dong)) ((hoa hoi) OR (hoa hoc)). hieu thi cham luc van thanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ((ty dong) or (tay dong)) ((hoa hoi) OR (hoa hoc)). hieu thi cham luc van thanh va cua tre*.