Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
chieu thien » chieu chien, hieu hien
thanh tuc » thanh tu, thanh tuu, thanh tung
van hanh » van thanh, ban hanh, van anh
tru nang » tra nang, tri nang, truc nano
va hanh » va thanh, va danh, ban hanh
su sach » so sach, vu sach
tu nang » tu nong, tu nano, tu lang
huu tre » huu tri, cuu tre, huu them
va huu » vu huu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tu nang) OR (tru nang)) x hoi. chieu thien thanh tuc ((va hanh) or (van hanh)) va huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu nang) OR (tru nang)) x hoi. chieu thien thanh tuc ((va hanh) OR (van hanh)) va huu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu nang) OR (tru nang)) x hoi. chieu thien thanh tuc ((va hanh) or (van hanh)) va huu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu nang) OR (tru nang)) x hoi. chieu thien thanh tuc ((va hanh) or (van hanh)) va huu tre*.