Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
ly vang » ly hang, ly van, ly quang
xa hanh » xa thanh, xa khanh, va hanh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
ly nang » ky nang, ly hang, ly quang
va cam » va cham, va cac, va cao
vi cuu » vi luu, vinh cuu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) ((ly nang) OR (ly vang)) x hoi. hieu va cam tuc xa hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ((ly nang) OR (ly vang)) x hoi. hieu va cam tuc xa hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ((ly nang) OR (ly vang)) x hoi. hieu va cam tuc xa hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ((ly nang) OR (ly vang)) x hoi. hieu va cam tuc xa hanh vi cuu tre*.