Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
tuc ban » thuc ban, truc ban, tu ban
cam tuc » cam xuc, cam tu, nam thuc
sach ky » sac ky, sach y, sach kem
hieu va » hieu qua
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
vi su » va su, ve su, ki su

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