Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
vien cac » vien bach, vien dai, vien da
thu sach » thuat sach, thuoc sach, thu hoach
nang ma » tang ma, sang ma, nang cao
tu nang » tru nang, tu nong, tu nano
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » su sach, te sach, tu cach
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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 (tu sach)) tu nang ma hoi. hieu vien cac xuc ((va thanh) or (ban hanh)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) tu nang ma hoi. hieu vien cac xuc ((va thanh) OR (ban hanh)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) tu nang ma hoi. hieu vien cac xuc ((va thanh) or (ban hanh)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) tu nang ma hoi. hieu vien cac xuc ((va thanh) or (ban hanh)) vai cuu tre*.