Perhaps you should try some spelling variations:
dang thuoc » dung thuoc
hanh thoi » hanh thuoc, nhanh thai, hanh noi
tu sach » thu sach, su sach, te sach
vuc van » duc van, luc van, thuc van
cam vuc » cam xuc
hieu ve » hieu va, hieu van
ky sang » ky dang, ky tang, duy sang
cua tre » cua te, cuu tre, cua triet
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: tu sach ((ky sang) or (ky nang)) xa hoi. hieu ve cam vuc van ((hanh thoi) or (dang thuoc)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky nang)) xa hoi. hieu ve cam vuc van ((hanh thoi) OR (dang thuoc)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) or (ky nang)) xa hoi. hieu ve cam vuc van ((hanh thoi) or (dang thuoc)) cua tre*.