Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
cua triet » cua viet, su triet, va triet
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
xuc van » duc van, luc van, vuc van
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
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: thuoc sac ky ((nang xa) or (nang ma)) hoi. hieu ((ve cam) or (vien cac)) xuc van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky ((nang xa) OR (nang ma)) hoi. hieu ((ve cam) OR (vien cac)) xuc van hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky ((nang xa) or (nang ma)) hoi. hieu ((ve cam) or (vien cac)) xuc van hanh vi cua triet*.