Perhaps you should try some spelling variations:
nang doc » nang luc
ve triet » va trien, su triet
su sach » so sach, vu sach
doc hoi » duoc hoi, hoc hoi, doc hai
suc van » su van, luc van, sac van
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
sach 2 » sach y
2 nang » v nang
va cao » va cac, va co, va dao
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: su sach 2 nang doc hoi. lieu va cao ((suc van) OR (duc van)) hanh va ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach 2 nang doc hoi. lieu va cao ((suc van) OR (duc van)) hanh va ve triet".
• Adding a wildcard symbol may retrieve word variants: su sach 2 nang doc hoi. lieu va cao ((suc van) OR (duc van)) hanh va ve triet*.