Perhaps you should try some spelling variations:
van xanh » van anh, van hanh, van manh
nang xa » nang x, lang xa, nang ma
va pham » van pham, va phat, va phap
duc van » duc va, duc tan, duc manh
doi cua » dai cua, hoi cua
tu dan » tuc dan, tu ban, cu dan
co dan » co ban, ca dan, cao dang
di cua » dai 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 dan) or (co dan)) ky nang xa hoi. lieu va pham duc van xanh ((di cua) OR (doi cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu dan) OR (co dan)) ky nang xa hoi. lieu va pham duc van xanh ((di cua) OR (doi cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu dan) or (co dan)) ky nang xa hoi. lieu va pham duc van xanh ((di cua) OR (doi cua)) viet".
• Adding a wildcard symbol may retrieve word variants: ((tu dan) or (co dan)) ky nang xa hoi. lieu va pham duc van xanh ((di cua) OR (doi cua)) viet*.