Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, le thanh
nam thuc » nam thuoc, am thuc, nam thu
cua tuc » cua tu, cua thuoc, luat tuc
va tinh » may tinh
bach ky » bac ky
ky lang » ky nang, ky dang, ky tang
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cua duc » cua nuoc, cua quoc
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky lang xa hoi. hieu va nam thuc ((va thanh) OR (va tinh)) de ((cua tuc) or (cua duc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky lang xa hoi. hieu va nam thuc ((va thanh) OR (va tinh)) de ((cua tuc) OR (cua duc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ky lang xa hoi. hieu va nam thuc ((va thanh) OR (va tinh)) de ((cua tuc) or (cua duc))".
• Adding a wildcard symbol may retrieve word variants: vu bach ky lang xa hoi. hieu va nam thuc ((va thanh) OR (va tinh)) de ((cua tuc) or (cua duc))*.