Perhaps you should try some spelling variations:
tham duc » pham duc, tham du, than duc
van hanh » van thanh, ban hanh, van anh
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
va tham » van tham, va cham, va thanh
cuu tre » cua tre, cau tren, cau treo
de cuu » de cua

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) OR (vu sach)) ky nang xa hoi. lieu va tham duc ((van hanh) or (van minh)) de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. lieu va tham duc ((van hanh) OR (van minh)) de cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky nang xa hoi. lieu va tham duc ((van hanh) or (van minh)) de cuu tre*".