Perhaps you should try some spelling variations:
thieu nien » thien nhien
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
nien cac » vien cac, dien cac, bien cac
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
vi 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: tu sach ky sang ma hoi. thieu nien cac xuc ((van hanh) OR (van thanh)) ((vi cua) or (vai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ma hoi. thieu nien cac xuc ((van hanh) OR (van thanh)) ((vi cua) OR (vai cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang ma hoi. thieu nien cac xuc ((van hanh) OR (van thanh)) ((vi cua) or (vai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ma hoi. thieu nien cac xuc ((van hanh) OR (van thanh)) ((vi cua) or (vai cua)) viet*.