Perhaps you should try some spelling variations:
sieu van » hieu van, su van, lieu va
nam truc » nam truoc, nam thuc, nam trung
van hanh » van thanh, ban hanh, van anh
hanh doi » thanh doi, hanh noi, hang doi
tu cach » tu cac
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam tu, nam thuoc
doi cua » dai cua, hoi 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 cach) or (tu sach)) ky nang xa hoi. sieu van ((nam tuc) or (nam truc)) van hanh doi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (tu sach)) ky nang xa hoi. sieu van ((nam tuc) OR (nam truc)) van hanh doi cua vat.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (tu sach)) ky nang xa hoi. sieu van ((nam tuc) or (nam truc)) van hanh doi cua vat*.