Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
tan hanh » tang hanh, toan hanh, tran hanh
nang xa » nang x, lang xa, nang ma
tu ban » thu ban, te ban
ban ky » van ky, dan ky
di cua » doi cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ky nang xa hoi. hieu van pham duc ((tan hanh) or (tan thanh)) ((di cua) OR (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky nang xa hoi. hieu van pham duc ((tan hanh) OR (tan thanh)) ((di cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ky nang xa hoi. hieu van pham duc ((tan hanh) or (tan thanh)) ((di cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu ban ky nang xa hoi. hieu van pham duc ((tan hanh) or (tan thanh)) ((di cua) OR (dai cua)) triet*.