Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van phan » van phong, van thanh, luan phan
phan duc » pham duc, phan tu, phan dau
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
vai cua » dai cua, hai cua, lai cua
doi cua » dai cua, hoi cua
di cua » dai cua, de cua, do 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 nang xa hoi. hieu van phan duc van hanh ((vai cua) or (((di cua) OR (doi cua)))) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van phan duc van hanh ((vai cua) OR (((di cua) OR (doi cua)))) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu van phan duc van hanh ((vai cua) or (((di cua) OR (doi cua)))) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van phan duc van hanh ((vai cua) or (((di cua) OR (doi cua)))) triet*.