Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
su triet » su tien, ve triet
pham duy » pham duc
tu sach » thu sach, su sach, te sach
dang de » dang deo, dung de, dang do
danh de » hanh de, dan de, danh di
tu pham » thu pham, su pham, tu phat
hieu tu » chieu tu, hieu tuc, hien tu
su viet » so viet
duy va » duy vat, duy van, day va
x hoi » xa hoi, o hoi, x ho

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 tru nang x hoi. hieu tu pham duy va ((danh de) or (dang de)) ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tru nang x hoi. hieu tu pham duy va ((danh de) OR (dang de)) ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang x hoi. hieu tu pham duy va ((danh de) or (dang de)) ((su triet) or (su viet))*.