Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
doi cua » dai cua, hoi cua, dong cua
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
tu cach » tu cac
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma

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

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