Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, tu cach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, dan bac
van hac » van hoc, van ha, van hai
va hanh » van hanh, va thanh, va danh
kem cua » em cua, keo cua, diem cua
tuc va » thuc va, truc va, tuc xa

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