Perhaps you should try some spelling variations:
thanh tiep » thanh hiep, thanh tien, thanh thieu
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
lam quoc » lam duoc, nam quoc, lam thuoc
quoc ban » quoc bao, quoc lan, quoc quan
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
van lam » van nam
tiep su » tieu su, tien su, tiep du

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 ky) or (sach ty)) nang xa hoi. hieu van lam quoc ban thanh tiep su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu van lam quoc ban thanh tiep su triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang xa hoi. hieu van lam quoc ban thanh tiep su triet*.