Perhaps you should try some spelling variations:
trinh ve » trinh he, trinh va, trinh vi
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
nang ho » nang hoc, nang co, tang ho
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
ho hoi » hoc hoi, hoa hoi, hoi hoi
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ve va » ve van, te va, ke va

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 y nang ho hoi. hieu va cac ((xuc va) OR (tuc va)) trinh ve va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ho hoi. hieu va cac ((xuc va) OR (tuc va)) trinh ve va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ho hoi. hieu va cac ((xuc va) OR (tuc va)) trinh ve va triet*.