Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dau tieng » dau tien, cau tieng, day tieng
dat tren » dat trong, dua tren
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
ty nang » ty xang, ty hang, ly nang
co hoi » co hoc, co loi
xuc va » duc va, tuc va, luc va
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((ty nang) OR (ky nang)) co hoi. hieu ve cac xuc va hanh ve ((dau tieng) or (dat tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((ty nang) OR (ky nang)) co hoi. hieu ve cac xuc va hanh ve ((dau tieng) OR (dat tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((ty nang) OR (ky nang)) co hoi. hieu ve cac xuc va hanh ve ((dau tieng) or (dat tren))*".