Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hanh lam » thanh lap, hanh kem, hanh va
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
duc van » duc va, duc manh, duc phan
lam cua » nam cua, lam chat

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