Perhaps you should try some spelling variations:
thien van » thi van
nang cau » nang cao, hang cau, nang dau
van cham » van chat, van tham, va cham
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
tu sac » tu cac, tu san, tu bac
soc va » loc va, doc va, goc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu sach)) ky nang cau hoi. thien van cham ((soc va) or (hoc va)) hanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang cau hoi. thien van cham ((soc va) OR (hoc va)) hanh lai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky nang cau hoi. thien van cham ((soc va) or (hoc va)) hanh lai su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky nang cau hoi. thien van cham ((soc va) or (hoc va)) hanh lai su triet*.