Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien cac » vien cac, dien cac, bien cac
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
vi cua » di cua
xuc va » duc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ma hoi. thieu nien cac ((xuc va) or (tuc va)) hanh ((vi cua) OR (vai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. thieu nien cac ((xuc va) OR (tuc va)) hanh ((vi cua) OR (vai cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoi. thieu nien cac ((xuc va) or (tuc va)) hanh ((vi cua) OR (vai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. thieu nien cac ((xuc va) or (tuc va)) hanh ((vi cua) OR (vai cua)) viet*.