Perhaps you should try some spelling variations:
ve triet » va trien
su triet » su viet, su tien
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
qua cham » qua hai, qua cac, va cham
sang ma » tang ma, nang ma, sang tao
sach ky » sac ky, sach y, sach ty
cham tu » pham tu, cam tu, chai tu
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach

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 ((nang xa) or (sang ma)) hoi. hieu qua cham tu va thanh vi ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (sang ma)) hoi. hieu qua cham tu va thanh vi ((su triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (sang ma)) hoi. hieu qua cham tu va thanh vi ((su triet) or (ve triet))*.