Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tay lang » tai lang, tay tang, tay quang
tu cach » tu cac
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
phuc va » phuc vu, thuc va, chuc va
vi cua » vai cua, di cua
va cau » van cau, va cac, va cao
va dau » va dao
cua te » cua tu

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 (thuoc sach)) tay lang xa hoi. hieu ((va cau) OR (va dau)) phuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) tay lang xa hoi. hieu ((va cau) OR (va dau)) phuc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thuoc sach)) tay lang xa hoi. hieu ((va cau) OR (va dau)) phuc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuoc sach)) tay lang xa hoi. hieu ((va cau) OR (va dau)) phuc va hanh vi cua te*.