Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
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
doi cua » dai cua, hoi cua, dong cua
vi cua » vai cua, di 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 cham duc van hanh ((vi 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 cham duc van hanh ((vi cua) OR (doi cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van cham duc van hanh ((vi cua) or (doi cua)) triet*.