Perhaps you should try some spelling variations:
thien van » thi van
tan khang » tao khang, tinh khang, toan thang
van khang » van khanh, van thanh, van quang
van pham » san pham, van phan, van phat
nang xa » nang x, lang xa, nang ma
cu dan » cua dan, ca dan, co dan
tu ban » thu ban, te ban
di va » dai va, di vao, doi va
thiet » thieu

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

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