Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
ban hanh » ban hang
tru nang » tra nang, tri nang, truc nano
chieu tu » chieu tro, lieu tu, chu tu
ve triet » su triet
cham duc » pham duc, pham duy, phan duc
sach tru » sach truc, sach thu, sach tu
hanh de » hanh ve, hanh kem
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma

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 tru nang xa hoi. chieu tu ((cham duc) or (cham soc)) ban hanh de ((ve triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru nang xa hoi. chieu tu ((cham duc) OR (cham soc)) ban hanh de ((ve triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tru nang xa hoi. chieu tu ((cham duc) or (cham soc)) ban hanh de ((ve triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: su sach tru nang xa hoi. chieu tu ((cham duc) or (cham soc)) ban hanh de ((ve triet) OR (va trien))*.