Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
nuoc sach » nguoi sach, hoc sach, cuoc cach
thu sach » tu sach, thuat sach, thuoc sach
vien cac » vien bach, vien dai, vien da
cau treo » cau theo, cau tren, cau triet
danh vi » hanh vi, dinh vi, danh di
tuc va » thuc va, truc va, duc va
vi cau » va cau, ve cau, di cau

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 (nuoc sach)) ky nang x ho. hieu vien cac ((tuc va) OR (tuc xa)) danh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (nuoc sach)) ky nang x ho. hieu vien cac ((tuc va) OR (tuc xa)) danh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (nuoc sach)) ky nang x ho. hieu vien cac ((tuc va) OR (tuc xa)) danh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (nuoc sach)) ky nang x ho. hieu vien cac ((tuc va) OR (tuc xa)) danh vi cau treo*.