Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
thu sach » tu sach, thuat sach, thuoc sach
hanh lam » thanh lap, hanh kem, hanh va
lam chat » luan chat, cao chat, ly chat
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc manh, duc phan
va cam » va cham, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu ((va cam) OR (va cac)) ((duc van) or (duc tan)) hanh lam chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ((va cam) OR (va cac)) ((duc van) OR (duc tan)) hanh lam chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu ((va cam) OR (va cac)) ((duc van) or (duc tan)) hanh lam chat triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ((va cam) OR (va cac)) ((duc van) or (duc tan)) hanh lam chat triet*.