Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thuat lap » thuat lanh, thuat xay, thuat bai
thu sach » tu sach, thuat sach, thuoc sach
vien cac » vien bach, vien dai, vien da
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (thuat lap)) ky lang xa hoi. hieu vien cac xuc ((va hanh) OR (va danh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat lap)) ky lang xa hoi. hieu vien cac xuc ((va hanh) OR (va danh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuat lap)) ky lang xa hoi. hieu vien cac xuc ((va hanh) OR (va danh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat lap)) ky lang xa hoi. hieu vien cac xuc ((va hanh) OR (va danh)) vi cua tre*.