Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
va triet » va thiet, ve triet, cua triet
su sach » so sach, vu sach
hieu ke » hieu kem, chieu ke, hieu ky
ke chau » ke cau, ky chau, ke chiu
nang xa » nang x, lang xa, nang ma
phu va » phuc va, phu la, phu ha
y nang » ky nang, ly nang, v nang
phu da » phu la, phu ha

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 y nang xa hoi. hieu ke chau ((phu va) OR (phu da)) hanh vi ((va triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ke chau ((phu va) OR (phu da)) hanh vi ((va triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ke chau ((phu va) OR (phu da)) hanh vi ((va triet) or (va trien))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ke chau ((phu va) OR (phu da)) hanh vi ((va triet) or (va trien))*.