Perhaps you should try some spelling variations:
pham duy » pham duc
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu vi » hieu voi, hieu va, hieu ve
va hanh » va thanh, va danh, ban hanh
vai cua » hai cua, lai cua, bai cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. hieu vi pham duy ((va hanh) OR (van hanh)) ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu vi pham duy ((va hanh) OR (van hanh)) ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu vi pham duy ((va hanh) OR (van hanh)) ((vai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu vi pham duy ((va hanh) OR (van hanh)) ((vai cua) or (dai cua)) tre*.