Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
cham tuc » nham thuc, pham thuc, tham thuc
tu sach » su sach, te sach, vu sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tu cach » tu cac
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
dan di » danh di, dan da, dan de
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (tu cach))) OR (thu sach)) ky nang x ho. hieu va cham tuc va dan di cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (tu cach))) or (thu sach)) ky nang x ho. hieu va cham tuc va dan di cua tre*.