Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
pham duy » pham duc
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duy van » duy vat, dung van
lai cua » hai cua, lai chau, thai cua

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 ty nang x ho. hieu ve pham duy van hanh ((lai cua) OR (dai cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x ho. hieu ve pham duy van hanh ((lai cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x ho. hieu ve pham duy van hanh ((lai cua) OR (dai cua)) triet*.