Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua nuoc » cua quoc, cua nguoi, cua thuoc
van hanh » ban hanh, van anh, van ban
te sach » toc sach
lang xa » lang ha, dang xay, lang van
sach o » sach lo, sac o, sach y
ve cam » ve cham, ve cac, va cam
o lang » hoa lang, hoi lang
vi cua » vai cua, di cua
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach o lang xa hoi. hieu ((ve cam) or (va cao)) tuc ((van hanh) OR (van thanh)) vi cua nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o lang xa hoi. hieu ((ve cam) OR (va cao)) tuc ((van hanh) OR (van thanh)) vi cua nuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach o lang xa hoi. hieu ((ve cam) or (va cao)) tuc ((van hanh) OR (van thanh)) vi cua nuoc".
• Adding a wildcard symbol may retrieve word variants: te sach o lang xa hoi. hieu ((ve cam) or (va cao)) tuc ((van hanh) OR (van thanh)) vi cua nuoc*.