Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
dau tren » dau tien, dat tren, dau tieng
ky danh » ky anh, ky dang
tac hai » tuc hai, tac ha, ta hai
tai hai » thi hai, dai hai, tai ha
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
vi dau » vi dai, va dau, bi dau

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 danh ((tac hai) OR (tai hai)). lieu va cam luc va hanh vi dau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sac ky danh ((tac hai) OR (tai hai)). lieu va cam luc va hanh vi dau tren".
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky danh ((tac hai) OR (tai hai)). lieu va cam luc va hanh vi dau tren*.