Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
vu sach » vu bach, su sach, vu khach
cam tuc » cam xuc, cam tu, nam thuc
doi cua » dai cua, hoi cua
da nang » cam nang, kha nang, cao nang
va nang » van nang, cam nang, kha nang
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (thuoc sach)) ky dang xa hoi. hieu ve cam tuc ((va nang) or (da nang)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (thuoc sach)) ky dang xa hoi. hieu ve cam tuc ((va nang) OR (da nang)) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (thuoc sach)) ky dang xa hoi. hieu ve cam tuc ((va nang) or (da nang)) doi cua tre*.