Perhaps you should try some spelling variations:
hieu san » hieu van, hieu sau, chieu sang
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 » hai cua, lai cua, bai cua
di cua » doi cua, de cua, do cua
pham » phan

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 san pham duc van hanh ((((vai cua) OR (dai cua))) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu san pham duc van hanh ((((vai cua) OR (dai cua))) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu san pham duc van hanh ((((vai cua) OR (dai cua))) or (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu san pham duc van hanh ((((vai cua) OR (dai cua))) or (di cua)) triet*.