Perhaps you should try some spelling variations:
mai tinh » may tinh, man tinh, mai dinh
pham duy » pham duc
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
duy mai » duy ai, duy thai
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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 tu) or (sach ty)) nang xa hoi. hieu van pham duy mai tinh ((di cua) or (de cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach ty)) nang xa hoi. hieu van pham duy mai tinh ((di cua) OR (de cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach ty)) nang xa hoi. hieu van pham duy mai tinh ((di cua) or (de cua)) triet*.