Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cua viet » ca viet, hoa viet, cua vat
cham tuc » nham thuc, tham thuc, cham soc
thu sach » tu sach, thuat sach, thuoc sach
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
so sach » so sanh, bo sach, co sach
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (thu sach)) ky nang xa hoi. lieu va ((cham tuc) OR (pham thuc)) va danh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (thu sach)) ky nang xa hoi. lieu va ((cham tuc) OR (pham thuc)) va danh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (thu sach)) ky nang xa hoi. lieu va ((cham tuc) OR (pham thuc)) va danh di cua viet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (thu sach)) ky nang xa hoi. lieu va ((cham tuc) OR (pham thuc)) va danh di cua viet*.