Perhaps you should try some spelling variations:
cham duoc » cham soc, pham duc, che duoc
thien van » thi van
van cham » van chat, van tham, va cham
su triet » su viet, ve triet
hanh lai » hanh lam, hanh tai, thanh lap
nang cau » nang cao, hang cau, nang dau
va hanh » van hanh, va thanh, va danh
duoc va » nuoc va, duc va, duoc ma
sach ky » sac ky, sach ty, sach kem
su tien » su kien, su hien, tu tieng

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