Perhaps you should try some spelling variations:
thieu bien » thieu nien, tieu bieu, hien bien
ve triet » va trien, su triet
thu sach » thuat sach, thuoc sach, thu hoach
bien cac » vien cac, dien cac, bien ca
hanh va » hang va, hanh vi
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va ve » va de, va le, va vi

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) or (thu sach)) ky nang xa hoi. thieu bien cac ((xuc va) OR (tuc va)) hanh va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. thieu bien cac ((xuc va) OR (tuc va)) hanh va ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang xa hoi. thieu bien cac ((xuc va) OR (tuc va)) hanh va ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang xa hoi. thieu bien cac ((xuc va) OR (tuc va)) hanh va ve triet*.