Perhaps you should try some spelling variations:
sach hoi » sach doi, sach moi, cach thoi
tinh vai » tinh va, tinh hai, tinh bai
sach lo » sach dao, sach doi, sach moi
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
xa tinh » va tinh, ha tinh, ca tinh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va hoi » xa hoi, va hoc, va hoa
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: so ((sach lo) OR (sach hoi)) hang va hoi. hieu va cam tuc xa tinh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach lo) OR (sach hoi)) hang va hoi. hieu va cam tuc xa tinh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach lo) OR (sach hoi)) hang va hoi. hieu va cam tuc xa tinh vai cua tre*.