Perhaps you should try some spelling variations:
qua pham » quan pham, quy pham, qua cham
pham duy » pham duc
vat dinh » va dinh, van dinh, vat sinh
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
ve cua » de cua, te cua, ve cum
le cua » ly 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 ky) or (sac ky)) lang xa hoi. hieu qua pham duy vat dinh ((ve cua) or (le cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) lang xa hoi. hieu qua pham duy vat dinh ((ve cua) OR (le cua)) te.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) lang xa hoi. hieu qua pham duy vat dinh ((ve cua) or (le cua)) te*.