Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
duc van » duc va, duc tan, duc manh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
de cua » le cua, te cua, dieu cua
di cua » dai cua, doi cua, do cua
tu san » thu san, tu can, vu san
tu ban » thu ban, te ban
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) OR (tu ban)) ky lang xa hoi. hieu va cam duc van thanh ((di cua) or (de cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu ban)) ky lang xa hoi. hieu va cam duc van thanh ((di cua) OR (de cua)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (tu ban)) ky lang xa hoi. hieu va cam duc van thanh ((di cua) or (de cua)) viet*".